74666421 has 16 divisors (see below), whose sum is σ = 111121920. Its totient is φ = 49550400.

The previous prime is 74666413. The next prime is 74666479. The reversal of 74666421 is 12466647.

It is not a de Polignac number, because 74666421 - 2³ = 74666413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74666401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180 + ... + 12221.

It is an arithmetic number, because the mean of its divisors is an integer number (6945120).

Almost surely, 2^74666421 is an apocalyptic number.

It is an amenable number.

74666421 is a deficient number, since it is larger than the sum of its proper divisors (36455499).

74666421 is a wasteful number, since it uses less digits than its factorization.

74666421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12633 (or 12627 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 74666421 is about 8640.9733826693. The cubic root of 74666421 is about 421.0901780221.

The spelling of 74666421 in words is "seventy-four million, six hundred sixty-six thousand, four hundred twenty-one".