66883955 has 4 divisors (see below), whose sum is σ = 80260752. Its totient is φ = 53507160.

The previous prime is 66883951. The next prime is 66883979. The reversal of 66883955 is 55938866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55938866 = 2 ⋅27969433.

It is not a de Polignac number, because 66883955 - 2² = 66883951 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 6688391 + ... + 6688400.

It is an arithmetic number, because the mean of its divisors is an integer number (20065188).

Almost surely, 2^66883955 is an apocalyptic number.

66883955 is a deficient number, since it is larger than the sum of its proper divisors (13376797).

66883955 is a wasteful number, since it uses less digits than its factorization.

66883955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13376796.

The product of its digits is 1555200, while the sum is 50.

The square root of 66883955 is about 8178.2611232462. The cubic root of 66883955 is about 405.9201858038.

The spelling of 66883955 in words is "sixty-six million, eight hundred eighty-three thousand, nine hundred fifty-five".