137651665 has 16 divisors (see below), whose sum is σ = 173155968. Its totient is φ = 104849536.

The previous prime is 137651659. The next prime is 137651677. The reversal of 137651665 is 566156731.

It is a cyclic number.

It is not a de Polignac number, because 137651665 - 2⁹ = 137651153 is a prime.

It is a Duffinian number.

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, 23469 + ... + 28741.

It is an arithmetic number, because the mean of its divisors is an integer number (10822248).

Almost surely, 2^137651665 is an apocalyptic number.

It is an amenable number.

137651665 is a deficient number, since it is larger than the sum of its proper divisors (35504303).

137651665 is a wasteful number, since it uses less digits than its factorization.

137651665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5528.

The product of its digits is 113400, while the sum is 40.

The square root of 137651665 is about 11732.5046345612. The cubic root of 137651665 is about 516.3297586201.

The spelling of 137651665 in words is "one hundred thirty-seven million, six hundred fifty-one thousand, six hundred sixty-five".