1665013707 has 24 divisors (see below), whose sum is σ = 2812519424. Its totient is φ = 929308464.

The previous prime is 1665013699. The next prime is 1665013729. The reversal of 1665013707 is 7073105661.

It is not a de Polignac number, because 1665013707 - 2³ = 1665013699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1665013607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304603 + ... + 310020.

Almost surely, 2^1665013707 is an apocalyptic number.

1665013707 is a deficient number, since it is larger than the sum of its proper divisors (1147505717).

1665013707 is a wasteful number, since it uses less digits than its factorization.

1665013707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614679 (or 614676 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 1665013707 is about 40804.5794856411. The cubic root of 1665013707 is about 1185.2390117683.

The spelling of 1665013707 in words is "one billion, six hundred sixty-five million, thirteen thousand, seven hundred seven".