61670656 has 72 divisors (see below), whose sum is σ = 134086400. Its totient is φ = 28200960.

The previous prime is 61670633. The next prime is 61670689. The reversal of 61670656 is 65607616.

It is a happy number.

It is a super-2 number, since 2×61670656² = 7606539622940672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150580 + ... + 150988.

Almost surely, 2^61670656 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 61670656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67043200).

61670656 is an abundant number, since it is smaller than the sum of its proper divisors (72415744).

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

61670656 is a wasteful number, since it uses less digits than its factorization.

61670656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 61670656 is about 7853.0666621391. The cubic root of 61670656 is about 395.0871057165.

It can be divided in two parts, 61670 and 656, that added together give a palindrome (62326).

The spelling of 61670656 in words is "sixty-one million, six hundred seventy thousand, six hundred fifty-six".