664402759197 has 4 divisors (see below), whose sum is σ = 885870345600. Its totient is φ = 442935172796.

The previous prime is 664402759183. The next prime is 664402759289. The reversal of 664402759197 is 791957204466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 664402759197 - 2⁶ = 664402759133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664402759197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664402758197) 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, 110733793197 + ... + 110733793202.

It is an arithmetic number, because the mean of its divisors is an integer number (221467586400).

Almost surely, 2^664402759197 is an apocalyptic number.

It is an amenable number.

664402759197 is a deficient number, since it is larger than the sum of its proper divisors (221467586403).

664402759197 is a wasteful number, since it uses less digits than its factorization.

664402759197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221467586402.

The product of its (nonzero) digits is 22861440, while the sum is 60.

The spelling of 664402759197 in words is "six hundred sixty-four billion, four hundred two million, seven hundred fifty-nine thousand, one hundred ninety-seven".