74664534 has 48 divisors (see below), whose sum is σ = 174625200. Its totient is φ = 21220416.

The previous prime is 74664533. The next prime is 74664539. The reversal of 74664534 is 43546647.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 74664492 and 74664501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74664533) 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, 66772 + ... + 67880.

It is an arithmetic number, because the mean of its divisors is an integer number (3638025).

Almost surely, 2^74664534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74664534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87312600).

74664534 is an abundant number, since it is smaller than the sum of its proper divisors (99960666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74664534 is a wasteful number, since it uses less digits than its factorization.

74664534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1350 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 74664534 is about 8640.8641928918. The cubic root of 74664534 is about 421.0866306718.

The spelling of 74664534 in words is "seventy-four million, six hundred sixty-four thousand, five hundred thirty-four".