67666944 has 44 divisors (see below), whose sum is σ = 180365264. Its totient is φ = 22554624.

The previous prime is 67666931. The next prime is 67666957. The reversal of 67666944 is 44966676.

It is an interprime number because it is at equal distance from previous prime (67666931) and next prime (67666957).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 67666893 and 67666902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7942 + ... + 14085.

Almost surely, 2^67666944 is an apocalyptic number.

67666944 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

67666944 is an abundant number, since it is smaller than the sum of its proper divisors (112698320).

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

67666944 is a wasteful number, since it uses less digits than its factorization.

67666944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22050 (or 22032 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 48.

The square root of 67666944 is about 8225.9919766555. The cubic root of 67666944 is about 407.4980370513.

The spelling of 67666944 in words is "sixty-seven million, six hundred sixty-six thousand, nine hundred forty-four".