66883864 has 48 divisors (see below), whose sum is σ = 133721280. Its totient is φ = 31328640.

The previous prime is 66883853. The next prime is 66883871. The reversal of 66883864 is 46838866.

66883864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339414 + ... + 339610.

It is an arithmetic number, because the mean of its divisors is an integer number (2785860).

Almost surely, 2^66883864 is an apocalyptic number.

It is an amenable number.

66883864 is a deficient number, since it is larger than the sum of its proper divisors (66837416).

66883864 is a wasteful number, since it uses less digits than its factorization.

66883864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 267 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 49.

The square root of 66883864 is about 8178.2555597144. The cubic root of 66883864 is about 405.9200017101.

The spelling of 66883864 in words is "sixty-six million, eight hundred eighty-three thousand, eight hundred sixty-four".