155630665 has 16 divisors (see below), whose sum is σ = 198305280. Its totient is φ = 116847360.

The previous prime is 155630647. The next prime is 155630669. The reversal of 155630665 is 566036551.

It is a happy number.

It is not a de Polignac number, because 155630665 - 2¹³ = 155622473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155630669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29800 + ... + 34630.

It is an arithmetic number, because the mean of its divisors is an integer number (12394080).

Almost surely, 2^155630665 is an apocalyptic number.

It is an amenable number.

155630665 is a deficient number, since it is larger than the sum of its proper divisors (42674615).

155630665 is a wasteful number, since it uses less digits than its factorization.

155630665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5232.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 155630665 is about 12475.2020023725. The cubic root of 155630665 is about 537.8960945535.

The spelling of 155630665 in words is "one hundred fifty-five million, six hundred thirty thousand, six hundred sixty-five".