155655665 has 16 divisors (see below), whose sum is σ = 204011136. Its totient is φ = 113068800.

The previous prime is 155655659. The next prime is 155655667. The reversal of 155655665 is 566556551.

It is not a de Polignac number, because 155655665 - 2⁴ = 155655649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155655667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82169 + ... + 84041.

It is an arithmetic number, because the mean of its divisors is an integer number (12750696).

Almost surely, 2^155655665 is an apocalyptic number.

It is an amenable number.

155655665 is a deficient number, since it is larger than the sum of its proper divisors (48355471).

155655665 is a wasteful number, since it uses less digits than its factorization.

155655665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400.

The product of its digits is 675000, while the sum is 44.

The square root of 155655665 is about 12476.2039499200. The cubic root of 155655665 is about 537.9248949667.

The spelling of 155655665 in words is "one hundred fifty-five million, six hundred fifty-five thousand, six hundred sixty-five".