66631324 has 12 divisors (see below), whose sum is σ = 116701984. Its totient is φ = 33287904.

The previous prime is 66631319. The next prime is 66631343. The reversal of 66631324 is 42313666.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 969 + ... + 11584.

Almost surely, 2^66631324 is an apocalyptic number.

It is an amenable number.

66631324 is a deficient number, since it is larger than the sum of its proper divisors (50070660).

66631324 is a wasteful number, since it uses less digits than its factorization.

66631324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13884 (or 13882 counting only the distinct ones).

The product of its digits is 15552, while the sum is 31.

The square root of 66631324 is about 8162.8012348703. The cubic root of 66631324 is about 405.4084666264.

The spelling of 66631324 in words is "sixty-six million, six hundred thirty-one thousand, three hundred twenty-four".