664164377 has 4 divisors (see below), whose sum is σ = 664296576. Its totient is φ = 664032180.

The previous prime is 664164373. The next prime is 664164383. The reversal of 664164377 is 773461466.

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 664164377 - 2² = 664164373 is a prime.

It is a super-2 number, since 2×664164377² = 882228639351596258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664164373) 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, 58253 + ... + 68714.

It is an arithmetic number, because the mean of its divisors is an integer number (166074144).

Almost surely, 2^664164377 is an apocalyptic number.

It is an amenable number.

664164377 is a deficient number, since it is larger than the sum of its proper divisors (132199).

664164377 is a wasteful number, since it uses less digits than its factorization.

664164377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132198.

The product of its digits is 508032, while the sum is 44.

The square root of 664164377 is about 25771.3867884520. The cubic root of 664164377 is about 872.4861187218.

The spelling of 664164377 in words is "six hundred sixty-four million, one hundred sixty-four thousand, three hundred seventy-seven".