6501616 has 80 divisors (see below), whose sum is σ = 15186528. Its totient is φ = 2662400.

The previous prime is 6501611. The next prime is 6501631. The reversal of 6501616 is 6161056.

It is a super-2 number, since 2×6501616² = 84542021222912, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 15.

It is a zygodrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122646 + ... + 122698.

Almost surely, 2^6501616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6501616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7593264).

6501616 is an abundant number, since it is smaller than the sum of its proper divisors (8684912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6501616 is a wasteful number, since it uses less digits than its factorization.

6501616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 6501616 is about 2549.8266607752. The cubic root of 6501616 is about 186.6410225543.

It can be divided in two parts, 6501 and 616, that added together give a palindrome (7117).

The spelling of 6501616 in words is "six million, five hundred one thousand, six hundred sixteen".