66959928 has 48 divisors (see below), whose sum is σ = 207258480. Its totient is φ = 19131264.

The previous prime is 66959897. The next prime is 66959941. The reversal of 66959928 is 82995966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65925 + ... + 66932.

It is an arithmetic number, because the mean of its divisors is an integer number (4317885).

Almost surely, 2^66959928 is an apocalyptic number.

It is an amenable number.

66959928 is an abundant number, since it is smaller than the sum of its proper divisors (140298552).

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

66959928 is a wasteful number, since it uses less digits than its factorization.

66959928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132876 (or 132869 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 66959928 is about 8182.9046187769. The cubic root of 66959928 is about 406.0738215801.

The spelling of 66959928 in words is "sixty-six million, nine hundred fifty-nine thousand, nine hundred twenty-eight".