6656715264 has 80 divisors (see below), whose sum is σ = 17752176288. Its totient is φ = 2216620032.

The previous prime is 6656715239. The next prime is 6656715323. The reversal of 6656715264 is 4625176566.

It is a super-3 number, since 3×6656715264³ (a number of 30 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 2190354 + ... + 2193390.

Almost surely, 2^6656715264 is an apocalyptic number.

6656715264 is a gapful number since it is divisible by the number (64) 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 6656715264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8876088144).

6656715264 is an abundant number, since it is smaller than the sum of its proper divisors (11095461024).

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

6656715264 is a wasteful number, since it uses less digits than its factorization.

6656715264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4485 (or 4469 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 48.

The square root of 6656715264 is about 81588.6956875767. The cubic root of 6656715264 is about 1881.1351285746.

The spelling of 6656715264 in words is "six billion, six hundred fifty-six million, seven hundred fifteen thousand, two hundred sixty-four".