665051610155 has 16 divisors (see below), whose sum is σ = 803954290464. Its totient is φ = 528113698560.

The previous prime is 665051610053. The next prime is 665051610203. The reversal of 665051610155 is 551016150566.

It is a de Polignac number, because none of the positive numbers 2^k-665051610155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9982184 + ... + 10048586.

It is an arithmetic number, because the mean of its divisors is an integer number (50247143154).

Almost surely, 2^665051610155 is an apocalyptic number.

665051610155 is a deficient number, since it is larger than the sum of its proper divisors (138902680309).

665051610155 is a wasteful number, since it uses less digits than its factorization.

665051610155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81166.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 665051610155 in words is "six hundred sixty-five billion, fifty-one million, six hundred ten thousand, one hundred fifty-five".