665165156514 has 8 divisors (see below), whose sum is σ = 1330330313040. Its totient is φ = 221721718836.

The previous prime is 665165156483. The next prime is 665165156521. The reversal of 665165156514 is 415651561566.

It is a happy number.

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

665165156514 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55430429704 + ... + 55430429715.

It is an arithmetic number, because the mean of its divisors is an integer number (166291289130).

Almost surely, 2^665165156514 is an apocalyptic number.

665165156514 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

665165156514 is a wasteful number, since it uses less digits than its factorization.

665165156514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110860859424.

The product of its digits is 3240000, while the sum is 51.

The spelling of 665165156514 in words is "six hundred sixty-five billion, one hundred sixty-five million, one hundred fifty-six thousand, five hundred fourteen".