129770665 has 16 divisors (see below), whose sum is σ = 164848320. Its totient is φ = 97796160.

The previous prime is 129770629. The next prime is 129770671. The reversal of 129770665 is 566077921.

It is not a de Polignac number, because 129770665 - 2¹³ = 129762473 is a prime.

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, 13422 + ... + 20968.

It is an arithmetic number, because the mean of its divisors is an integer number (10303020).

Almost surely, 2^129770665 is an apocalyptic number.

It is an amenable number.

129770665 is a deficient number, since it is larger than the sum of its proper divisors (35077655).

129770665 is a wasteful number, since it uses less digits than its factorization.

129770665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 129770665 is about 11391.6928066025. The cubic root of 129770665 is about 506.2816382198.

The spelling of 129770665 in words is "one hundred twenty-nine million, seven hundred seventy thousand, six hundred sixty-five".