6657396836 has 6 divisors (see below), whose sum is σ = 11650444470. Its totient is φ = 3328698416.

The previous prime is 6657396821. The next prime is 6657396857. The reversal of 6657396836 is 6386937566.

It can be written as a sum of positive squares in only one way, i.e., 6327247936 + 330148900 = 79544^2 + 18170^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832174601 + ... + 832174608.

It is an arithmetic number, because the mean of its divisors is an integer number (1941740745).

Almost surely, 2^6657396836 is an apocalyptic number.

It is an amenable number.

6657396836 is a deficient number, since it is larger than the sum of its proper divisors (4993047634).

6657396836 is a wasteful number, since it uses less digits than its factorization.

6657396836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664349213 (or 1664349211 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 59.

The square root of 6657396836 is about 81592.8724583220. The cubic root of 6657396836 is about 1881.1993286705.

The spelling of 6657396836 in words is "six billion, six hundred fifty-seven million, three hundred ninety-six thousand, eight hundred thirty-six".