664302551 has 8 divisors (see below), whose sum is σ = 744280464. Its totient is φ = 587589120.

The previous prime is 664302539. The next prime is 664302563. The reversal of 664302551 is 155203466.

It is an interprime number because it is at equal distance from previous prime (664302539) and next prime (664302563).

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 664302551 - 2⁶ = 664302487 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 (664352551) 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, 815690 + ... + 816503.

It is an arithmetic number, because the mean of its divisors is an integer number (93035058).

Almost surely, 2^664302551 is an apocalyptic number.

664302551 is a deficient number, since it is larger than the sum of its proper divisors (79977913).

664302551 is a wasteful number, since it uses less digits than its factorization.

664302551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632241.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 664302551 is about 25774.0674128086. The cubic root of 664302551 is about 872.5466190748.

The spelling of 664302551 in words is "six hundred sixty-four million, three hundred two thousand, five hundred fifty-one".