2665431967 has 16 divisors (see below), whose sum is σ = 3112675200. Its totient is φ = 2256668640.

The previous prime is 2665431959. The next prime is 2665431971. The reversal of 2665431967 is 7691345662.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2665431967 - 2³ = 2665431959 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 2665431967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665431667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95748 + ... + 120409.

It is an arithmetic number, because the mean of its divisors is an integer number (194542200).

Almost surely, 2^2665431967 is an apocalyptic number.

2665431967 is a deficient number, since it is larger than the sum of its proper divisors (447243233).

2665431967 is a wasteful number, since it uses less digits than its factorization.

2665431967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216246.

The product of its digits is 1632960, while the sum is 49.

The square root of 2665431967 is about 51627.8216371754. The cubic root of 2665431967 is about 1386.5084924274.

The spelling of 2665431967 in words is "two billion, six hundred sixty-five million, four hundred thirty-one thousand, nine hundred sixty-seven".