665006155 has 16 divisors (see below), whose sum is σ = 883551744. Its totient is φ = 476419680.

The previous prime is 665006117. The next prime is 665006161. The reversal of 665006155 is 551600566.

It is a de Polignac number, because none of the positive numbers 2^k-665006155 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665006155.

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, 86547 + ... + 93916.

It is an arithmetic number, because the mean of its divisors is an integer number (55221984).

Almost surely, 2^665006155 is an apocalyptic number.

665006155 is a deficient number, since it is larger than the sum of its proper divisors (218545589).

665006155 is a wasteful number, since it uses less digits than its factorization.

665006155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180546.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 665006155 is about 25787.7132565104. The cubic root of 665006155 is about 872.8545664443.

The spelling of 665006155 in words is "six hundred sixty-five million, six thousand, one hundred fifty-five".