666264562165 has 8 divisors (see below), whose sum is σ = 809637949440. Its totient is φ = 526264666512.

The previous prime is 666264562153. The next prime is 666264562177. The reversal of 666264562165 is 561265462666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (666264562153) and next prime (666264562177).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666264562165 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 843372469 + ... + 843373258.

It is an arithmetic number, because the mean of its divisors is an integer number (101204743680).

Almost surely, 2^666264562165 is an apocalyptic number.

It is an amenable number.

666264562165 is a deficient number, since it is larger than the sum of its proper divisors (143373387275).

666264562165 is a wasteful number, since it uses less digits than its factorization.

666264562165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686745811.

The product of its digits is 18662400, while the sum is 55.

The spelling of 666264562165 in words is "six hundred sixty-six billion, two hundred sixty-four million, five hundred sixty-two thousand, one hundred sixty-five".