74555680 has 48 divisors (see below), whose sum is σ = 178645824. Its totient is φ = 29397760.

The previous prime is 74555669. The next prime is 74555699. The reversal of 74555680 is 8655547.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8079 + ... + 14641.

It is an arithmetic number, because the mean of its divisors is an integer number (3721788).

Almost surely, 2^74555680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74555680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89322912).

74555680 is an abundant number, since it is smaller than the sum of its proper divisors (104090144).

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

74555680 is a wasteful number, since it uses less digits than its factorization.

74555680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6649 (or 6641 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 74555680 is about 8634.5631041761. The cubic root of 74555680 is about 420.8818959959.

The spelling of 74555680 in words is "seventy-four million, five hundred fifty-five thousand, six hundred eighty".