664200551 has 8 divisors (see below), whose sum is σ = 760358400. Its totient is φ = 568360728.

The previous prime is 664200541. The next prime is 664200571. The reversal of 664200551 is 155002466.

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 664200551 - 2¹⁴ = 664184167 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 (664200521) 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, 75011 + ... + 83396.

It is an arithmetic number, because the mean of its divisors is an integer number (95044800).

Almost surely, 2^664200551 is an apocalyptic number.

664200551 is a deficient number, since it is larger than the sum of its proper divisors (96157849).

664200551 is a wasteful number, since it uses less digits than its factorization.

664200551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159013.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 664200551 is about 25772.0886037589. The cubic root of 664200551 is about 872.5019585455.

The spelling of 664200551 in words is "six hundred sixty-four million, two hundred thousand, five hundred fifty-one".