665700843617202 has 32 divisors (see below), whose sum is σ = 1332334537934400. Its totient is φ = 221744813711360.

The previous prime is 665700843617137. The next prime is 665700843617219. The reversal of 665700843617202 is 202716348007566.

It is a happy number.

It is a super-2 number, since 2×665700843617202² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356223049 + ... + 358086947.

It is an arithmetic number, because the mean of its divisors is an integer number (41635454310450).

Almost surely, 2^{665700843617202} is an apocalyptic number.

665700843617202 is an abundant number, since it is smaller than the sum of its proper divisors (666633694317198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665700843617202 is a wasteful number, since it uses less digits than its factorization.

665700843617202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905578.

The product of its (nonzero) digits is 20321280, while the sum is 57.

The spelling of 665700843617202 in words is "six hundred sixty-five trillion, seven hundred billion, eight hundred forty-three million, six hundred seventeen thousand, two hundred two".