661929124 has 12 divisors (see below), whose sum is σ = 1158562944. Its totient is φ = 330911144.

The previous prime is 661929109. The next prime is 661929131. The reversal of 661929124 is 421929166.

661929124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 30597 + ... + 47539.

It is an arithmetic number, because the mean of its divisors is an integer number (96546912).

Almost surely, 2^661929124 is an apocalyptic number.

It is an amenable number.

661929124 is a deficient number, since it is larger than the sum of its proper divisors (496633820).

661929124 is a wasteful number, since it uses less digits than its factorization.

661929124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26714 (or 26712 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 661929124 is about 25727.9832866861. The cubic root of 661929124 is about 871.5062312023.

The spelling of 661929124 in words is "six hundred sixty-one million, nine hundred twenty-nine thousand, one hundred twenty-four".