664031562 has 8 divisors (see below), whose sum is σ = 1328063136. Its totient is φ = 221343852.

The previous prime is 664031521. The next prime is 664031567. The reversal of 664031562 is 265130466.

It is a sphenic number, since it is the product of 3 distinct primes.

664031562 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (664031567) 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, 55335958 + ... + 55335969.

It is an arithmetic number, because the mean of its divisors is an integer number (166007892).

Almost surely, 2^664031562 is an apocalyptic number.

664031562 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

664031562 is a wasteful number, since it uses less digits than its factorization.

664031562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110671932.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 664031562 is about 25768.8098677452. The cubic root of 664031562 is about 872.4279569308.

The spelling of 664031562 in words is "six hundred sixty-four million, thirty-one thousand, five hundred sixty-two".