66439024 has 20 divisors (see below), whose sum is σ = 131866560. Its totient is φ = 32408960.

The previous prime is 66439007. The next prime is 66439033. The reversal of 66439024 is 42093466.

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, 49984 + ... + 51295.

It is an arithmetic number, because the mean of its divisors is an integer number (6593328).

Almost surely, 2^66439024 is an apocalyptic number.

It is an amenable number.

66439024 is a deficient number, since it is larger than the sum of its proper divisors (65427536).

66439024 is a wasteful number, since it uses less digits than its factorization.

66439024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101328 (or 101322 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 66439024 is about 8151.0136792917. The cubic root of 66439024 is about 405.0180838341.

The spelling of 66439024 in words is "sixty-six million, four hundred thirty-nine thousand, twenty-four".