664952403 has 8 divisors (see below), whose sum is σ = 888662016. Its totient is φ = 442272200.

The previous prime is 664952369. The next prime is 664952411. The reversal of 664952403 is 304259466.

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 664952403 - 2¹² = 664948307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664952413) 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, 255843 + ... + 258428.

It is an arithmetic number, because the mean of its divisors is an integer number (111082752).

Almost surely, 2^664952403 is an apocalyptic number.

664952403 is a deficient number, since it is larger than the sum of its proper divisors (223709613).

664952403 is a wasteful number, since it uses less digits than its factorization.

664952403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514705.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 664952403 is about 25786.6710336949. The cubic root of 664952403 is about 872.8310483949.

The spelling of 664952403 in words is "six hundred sixty-four million, nine hundred fifty-two thousand, four hundred three".