149979665 has 32 divisors (see below), whose sum is σ = 208832256. Its totient is φ = 102319360.

The previous prime is 149979659. The next prime is 149979667. The reversal of 149979665 is 566979941.

It is not a de Polignac number, because 149979665 - 2⁴ = 149979649 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 149979665.

It is not an unprimeable number, because it can be changed into a prime (149979667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65927 + ... + 68163.

It is an arithmetic number, because the mean of its divisors is an integer number (6526008).

Almost surely, 2^149979665 is an apocalyptic number.

It is an amenable number.

149979665 is a deficient number, since it is larger than the sum of its proper divisors (58852591).

149979665 is a wasteful number, since it uses less digits than its factorization.

149979665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329.

The product of its digits is 3674160, while the sum is 56.

The square root of 149979665 is about 12246.6185128794. The cubic root of 149979665 is about 531.3052733262.

The spelling of 149979665 in words is "one hundred forty-nine million, nine hundred seventy-nine thousand, six hundred sixty-five".