666165210153 has 4 divisors (see below), whose sum is σ = 888220280208. Its totient is φ = 444110140100.

The previous prime is 666165210077. The next prime is 666165210167. The reversal of 666165210153 is 351012561666.

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 666165210153 - 2²⁶ = 666098101289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (666165214153) 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, 111027535023 + ... + 111027535028.

It is an arithmetic number, because the mean of its divisors is an integer number (222055070052).

Almost surely, 2^666165210153 is an apocalyptic number.

It is an amenable number.

666165210153 is a deficient number, since it is larger than the sum of its proper divisors (222055070055).

666165210153 is a wasteful number, since it uses less digits than its factorization.

666165210153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222055070054.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 666165210153 in words is "six hundred sixty-six billion, one hundred sixty-five million, two hundred ten thousand, one hundred fifty-three".