6501656700 has 432 divisors, whose sum is σ = 26265818880. Its totient is φ = 1350518400.

The previous prime is 6501656671. The next prime is 6501656731. The reversal of 6501656700 is 76561056.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2285479 + ... + 2288321.

Almost surely, 2^6501656700 is an apocalyptic number.

6501656700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6501656700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13132909440).

6501656700 is an abundant number, since it is smaller than the sum of its proper divisors (19764162180).

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

6501656700 is a wasteful number, since it uses less digits than its factorization.

6501656700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895 (or 2871 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 6501656700 is about 80632.8512456306. The cubic root of 6501656700 is about 1866.4141200997.

The spelling of 6501656700 in words is "six billion, five hundred one million, six hundred fifty-six thousand, seven hundred".