664100490 has 32 divisors (see below), whose sum is σ = 1596510720. Its totient is φ = 176796864.

The previous prime is 664100477. The next prime is 664100497. The reversal of 664100490 is 94001466.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (664100497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25 + ... + 36444.

It is an arithmetic number, because the mean of its divisors is an integer number (49890960).

Almost surely, 2^664100490 is an apocalyptic number.

664100490 is an abundant number, since it is smaller than the sum of its proper divisors (932410230).

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

664100490 is a wasteful number, since it uses less digits than its factorization.

664100490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37086.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 664100490 is about 25770.1472638400. The cubic root of 664100490 is about 872.4581425611.

The spelling of 664100490 in words is "six hundred sixty-four million, one hundred thousand, four hundred ninety".