4665138691 has 16 divisors (see below), whose sum is σ = 5157402624. Its totient is φ = 4197308544.

The previous prime is 4665138683. The next prime is 4665138697. The reversal of 4665138691 is 1968315664.

It is a cyclic number.

It is not a de Polignac number, because 4665138691 - 2³ = 4665138683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4665138697) 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, 1046830 + ... + 1051276.

It is an arithmetic number, because the mean of its divisors is an integer number (322337664).

Almost surely, 2^4665138691 is an apocalyptic number.

4665138691 is a deficient number, since it is larger than the sum of its proper divisors (492263933).

4665138691 is a wasteful number, since it uses less digits than its factorization.

4665138691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7170.

The product of its digits is 933120, while the sum is 49.

The square root of 4665138691 is about 68301.8205540672. The cubic root of 4665138691 is about 1670.9169060966.

The spelling of 4665138691 in words is "four billion, six hundred sixty-five million, one hundred thirty-eight thousand, six hundred ninety-one".