74512665 has 24 divisors (see below), whose sum is σ = 130033800. Its totient is φ = 39469824.

The previous prime is 74512637. The next prime is 74512667. The reversal of 74512665 is 56621547.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4756761 + 69755904 = 2181^2 + 8352^2 .

It is not a de Polignac number, because 74512665 - 2⁹ = 74512153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74512667) 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 23 ways as a sum of consecutive naturals, for example, 1149 + ... + 12261.

It is an arithmetic number, because the mean of its divisors is an integer number (5418075).

Almost surely, 2^74512665 is an apocalyptic number.

It is an amenable number.

74512665 is a deficient number, since it is larger than the sum of its proper divisors (55521135).

74512665 is a wasteful number, since it uses less digits than its factorization.

74512665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11273 (or 11270 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 74512665 is about 8632.0718833893. The cubic root of 74512665 is about 420.8009376319.

The spelling of 74512665 in words is "seventy-four million, five hundred twelve thousand, six hundred sixty-five".