66657499716 has 48 divisors (see below), whose sum is σ = 163033028928. Its totient is φ = 21173107200.

The previous prime is 66657499693. The next prime is 66657499723. The reversal of 66657499716 is 61799475666.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1554225 + ... + 1596536.

It is an arithmetic number, because the mean of its divisors is an integer number (3396521436).

Almost surely, 2^66657499716 is an apocalyptic number.

It is an amenable number.

66657499716 is an abundant number, since it is smaller than the sum of its proper divisors (96375529212).

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

66657499716 is a wasteful number, since it uses less digits than its factorization.

66657499716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150852 (or 3150850 counting only the distinct ones).

The product of its digits is 102876480, while the sum is 66.

The spelling of 66657499716 in words is "sixty-six billion, six hundred fifty-seven million, four hundred ninety-nine thousand, seven hundred sixteen".