74720757 has 8 divisors (see below), whose sum is σ = 102841600. Its totient is φ = 48206880.

The previous prime is 74720743. The next prime is 74720761. The reversal of 74720757 is 75702747.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74720757 - 2⁶ = 74720693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74720707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401632 + ... + 401817.

It is an arithmetic number, because the mean of its divisors is an integer number (12855200).

Almost surely, 2^74720757 is an apocalyptic number.

It is an amenable number.

74720757 is a deficient number, since it is larger than the sum of its proper divisors (28120843).

74720757 is a wasteful number, since it uses less digits than its factorization.

74720757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803483.

The product of its (nonzero) digits is 96040, while the sum is 39.

The square root of 74720757 is about 8644.1169011068. The cubic root of 74720757 is about 421.1922980368.

The spelling of 74720757 in words is "seventy-four million, seven hundred twenty thousand, seven hundred fifty-seven".