666604411177 has 4 divisors (see below), whose sum is σ = 668959904080. Its totient is φ = 664248918276.

The previous prime is 666604411117. The next prime is 666604411183. The reversal of 666604411177 is 771114406666.

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 666604411177 - 2²⁷ = 666470193449 is a prime.

It is a super-2 number, since 2×666604411177² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666604411177.

It is not an unprimeable number, because it can be changed into a prime (666604411117) 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, 1177746027 + ... + 1177746592.

It is an arithmetic number, because the mean of its divisors is an integer number (167239976020).

Almost surely, 2^666604411177 is an apocalyptic number.

It is an amenable number.

666604411177 is a deficient number, since it is larger than the sum of its proper divisors (2355492903).

666604411177 is a wasteful number, since it uses less digits than its factorization.

666604411177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355492902.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 666604411177 in words is "six hundred sixty-six billion, six hundred four million, four hundred eleven thousand, one hundred seventy-seven".