664013474 has 8 divisors (see below), whose sum is σ = 998842860. Its totient is φ = 331065856.

The previous prime is 664013453. The next prime is 664013479. The reversal of 664013474 is 474310466.

It can be written as a sum of positive squares in 2 ways, for example, as 648466225 + 15547249 = 25465^2 + 3943^2 .

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

It is not an unprimeable number, because it can be changed into a prime (664013479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469559 + ... + 470970.

Almost surely, 2^664013474 is an apocalyptic number.

664013474 is a deficient number, since it is larger than the sum of its proper divisors (334829386).

664013474 is a wasteful number, since it uses less digits than its factorization.

664013474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940884.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 664013474 is about 25768.4588984285. The cubic root of 664013474 is about 872.4200353093.

The spelling of 664013474 in words is "six hundred sixty-four million, thirteen thousand, four hundred seventy-four".