664874442 has 24 divisors (see below), whose sum is σ = 1450107360. Its totient is φ = 220156200.

The previous prime is 664874407. The next prime is 664874443. The reversal of 664874442 is 244478466.

664874442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×664874442² = 884116047249622728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664874443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119592 + ... + 125027.

It is an arithmetic number, because the mean of its divisors is an integer number (60421140).

Almost surely, 2^664874442 is an apocalyptic number.

664874442 is an abundant number, since it is smaller than the sum of its proper divisors (785232918).

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

664874442 is a wasteful number, since it uses less digits than its factorization.

664874442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244778 (or 244775 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 45.

The square root of 664874442 is about 25785.1593363314. The cubic root of 664874442 is about 872.7969359579.

The spelling of 664874442 in words is "six hundred sixty-four million, eight hundred seventy-four thousand, four hundred forty-two".