74766125421 has 36 divisors (see below), whose sum is σ = 116979721716. Its totient is φ = 45995040000.

The previous prime is 74766125417. The next prime is 74766125431. The reversal of 74766125421 is 12452166747.

74766125421 is a `hidden beast` number, since 7 + 4 + 7 + 6 + 612 + 5 + 4 + 21 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 18012592521 + 56753532900 = 134211^2 + 238230^2 .

It is not a de Polignac number, because 74766125421 - 2² = 74766125417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74766125411) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6383871 + ... + 6395571.

Almost surely, 2^74766125421 is an apocalyptic number.

It is an amenable number.

74766125421 is a deficient number, since it is larger than the sum of its proper divisors (42213596295).

74766125421 is a wasteful number, since it uses less digits than its factorization.

74766125421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15934 (or 15918 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The spelling of 74766125421 in words is "seventy-four billion, seven hundred sixty-six million, one hundred twenty-five thousand, four hundred twenty-one".