666696519124 has 12 divisors (see below), whose sum is σ = 1167061379904. Its totient is φ = 333250410584.

The previous prime is 666696519109. The next prime is 666696519161. The reversal of 666696519124 is 421915696666.

It is a super-2 number, since 2×666696519124² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24446914 + ... + 24474169.

It is an arithmetic number, because the mean of its divisors is an integer number (97255114992).

Almost surely, 2^666696519124 is an apocalyptic number.

It is an amenable number.

666696519124 is a deficient number, since it is larger than the sum of its proper divisors (500364860780).

666696519124 is a wasteful number, since it uses less digits than its factorization.

666696519124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48924494 (or 48924492 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 61.

The spelling of 666696519124 in words is "six hundred sixty-six billion, six hundred ninety-six million, five hundred nineteen thousand, one hundred twenty-four".