2665749957 has 64 divisors (see below), whose sum is σ = 4173845760. Its totient is φ = 1498558464.

The previous prime is 2665749953. The next prime is 2665749997. The reversal of 2665749957 is 7599475662.

It is not a de Polignac number, because 2665749957 - 2² = 2665749953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2665749957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665749953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3759519 + ... + 3760227.

It is an arithmetic number, because the mean of its divisors is an integer number (65216340).

Almost surely, 2^2665749957 is an apocalyptic number.

It is an amenable number.

2665749957 is a deficient number, since it is larger than the sum of its proper divisors (1508095803).

2665749957 is a wasteful number, since it uses less digits than its factorization.

2665749957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902.

The product of its digits is 28576800, while the sum is 60.

The square root of 2665749957 is about 51630.9011833030. The cubic root of 2665749957 is about 1386.5636277437.

The spelling of 2665749957 in words is "two billion, six hundred sixty-five million, seven hundred forty-nine thousand, nine hundred fifty-seven".