664629374 has 8 divisors (see below), whose sum is σ = 997322880. Its totient is φ = 332188416.

The previous prime is 664629373. The next prime is 664629377. The reversal of 664629374 is 473926466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664629373) 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, 56414 + ... + 67169.

It is an arithmetic number, because the mean of its divisors is an integer number (124665360).

Almost surely, 2^664629374 is an apocalyptic number.

664629374 is a deficient number, since it is larger than the sum of its proper divisors (332693506).

664629374 is a wasteful number, since it uses less digits than its factorization.

664629374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126274.

The product of its digits is 1306368, while the sum is 47.

The square root of 664629374 is about 25780.4067849986. The cubic root of 664629374 is about 872.6896871946.

The spelling of 664629374 in words is "six hundred sixty-four million, six hundred twenty-nine thousand, three hundred seventy-four".