664941901 has 8 divisors (see below), whose sum is σ = 721731584. Its totient is φ = 608958000.

The previous prime is 664941881. The next prime is 664941913. The reversal of 664941901 is 109149466.

664941901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 664941901 - 2⁷ = 664941773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664941301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199725 + ... + 203026.

It is an arithmetic number, because the mean of its divisors is an integer number (90216448).

Almost surely, 2^664941901 is an apocalyptic number.

It is an amenable number.

664941901 is a deficient number, since it is larger than the sum of its proper divisors (56789683).

664941901 is a wasteful number, since it uses less digits than its factorization.

664941901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402891.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 664941901 is about 25786.4674005572. The cubic root of 664941901 is about 872.8264533191.

The spelling of 664941901 in words is "six hundred sixty-four million, nine hundred forty-one thousand, nine hundred one".