66078924 has 24 divisors (see below), whose sum is σ = 155050560. Its totient is φ = 21902544.

The previous prime is 66078911. The next prime is 66078953. The reversal of 66078924 is 42987066.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13234 + ... + 17529.

It is an arithmetic number, because the mean of its divisors is an integer number (6460440).

Almost surely, 2^66078924 is an apocalyptic number.

It is an amenable number.

66078924 is an abundant number, since it is smaller than the sum of its proper divisors (88971636).

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

66078924 is a wasteful number, since it uses less digits than its factorization.

66078924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30949 (or 30947 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 66078924 is about 8128.8943897679. The cubic root of 66078924 is about 404.2850241713.

The spelling of 66078924 in words is "sixty-six million, seventy-eight thousand, nine hundred twenty-four".