137655665 has 32 divisors (see below), whose sum is σ = 199653120. Its totient is φ = 89005824.

The previous prime is 137655643. The next prime is 137655671. The reversal of 137655665 is 566556731.

It is a cyclic number.

It is not a de Polignac number, because 137655665 - 2⁶ = 137655601 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 210479 + ... + 211131.

It is an arithmetic number, because the mean of its divisors is an integer number (6239160).

Almost surely, 2^137655665 is an apocalyptic number.

It is an amenable number.

137655665 is a deficient number, since it is larger than the sum of its proper divisors (61997455).

137655665 is a wasteful number, since it uses less digits than its factorization.

137655665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001.

The product of its digits is 567000, while the sum is 44.

The square root of 137655665 is about 11732.6750999079. The cubic root of 137655665 is about 516.3347598891.

The spelling of 137655665 in words is "one hundred thirty-seven million, six hundred fifty-five thousand, six hundred sixty-five".