6656663610 has 48 divisors (see below), whose sum is σ = 17325449856. Its totient is φ = 1773251424.

The previous prime is 6656663591. The next prime is 6656663617. The reversal of 6656663610 is 163666566.

It is a super-2 number, since 2×6656663610² = 88622340833396464200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (6656663617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48787 + ... + 125273.

It is an arithmetic number, because the mean of its divisors is an integer number (360946872).

Almost surely, 2^6656663610 is an apocalyptic number.

6656663610 is an abundant number, since it is smaller than the sum of its proper divisors (10668786246).

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

6656663610 is a wasteful number, since it uses less digits than its factorization.

6656663610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77467 (or 77464 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The square root of 6656663610 is about 81588.3791357568. The cubic root of 6656663610 is about 1881.1302628913.

The spelling of 6656663610 in words is "six billion, six hundred fifty-six million, six hundred sixty-three thousand, six hundred ten".