74658641 has 4 divisors (see below), whose sum is σ = 74740800. Its totient is φ = 74576484.

The previous prime is 74658589. The next prime is 74658671. The reversal of 74658641 is 14685647.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14685647 = 313 ⋅46919.

It is a cyclic number.

It is not a de Polignac number, because 74658641 - 2²⁶ = 7549777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74658671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39701 + ... + 41538.

It is an arithmetic number, because the mean of its divisors is an integer number (18685200).

Almost surely, 2^74658641 is an apocalyptic number.

It is an amenable number.

74658641 is a deficient number, since it is larger than the sum of its proper divisors (82159).

74658641 is an equidigital number, since it uses as much as digits as its factorization.

74658641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82158.

The product of its digits is 161280, while the sum is 41.

The square root of 74658641 is about 8640.5231901778. The cubic root of 74658641 is about 421.0755521018.

The spelling of 74658641 in words is "seventy-four million, six hundred fifty-eight thousand, six hundred forty-one".