66883957 has 16 divisors (see below), whose sum is σ = 79363072. Its totient is φ = 55157760.

The previous prime is 66883951. The next prime is 66883979. The reversal of 66883957 is 75938866.

It is not a de Polignac number, because 66883957 - 2⁷ = 66883829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66883951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41083 + ... + 42679.

It is an arithmetic number, because the mean of its divisors is an integer number (4960192).

Almost surely, 2^66883957 is an apocalyptic number.

It is an amenable number.

66883957 is a deficient number, since it is larger than the sum of its proper divisors (12479115).

66883957 is a wasteful number, since it uses less digits than its factorization.

66883957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828.

The product of its digits is 2177280, while the sum is 52.

The square root of 66883957 is about 8178.2612455216. The cubic root of 66883957 is about 405.9201898498.

The spelling of 66883957 in words is "sixty-six million, eight hundred eighty-three thousand, nine hundred fifty-seven".