66674560 has 32 divisors (see below), whose sum is σ = 159395400. Its totient is φ = 26669568.

The previous prime is 66674551. The next prime is 66674579. The reversal of 66674560 is 6547666.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

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, 51450 + ... + 52729.

Almost surely, 2^66674560 is an apocalyptic number.

It is an amenable number.

66674560 is an abundant number, since it is smaller than the sum of its proper divisors (92720840).

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

66674560 is a wasteful number, since it uses less digits than its factorization.

66674560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104198 (or 104186 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 66674560 is about 8165.4491609464. The cubic root of 66674560 is about 405.4961353559.

The spelling of 66674560 in words is "sixty-six million, six hundred seventy-four thousand, five hundred sixty".