2764640661 has 8 divisors (see below), whose sum is σ = 3686878944. Its totient is φ = 1842748080.

The previous prime is 2764640653. The next prime is 2764640663. The reversal of 2764640661 is 1660464672.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2764640661 - 2³ = 2764640653 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2764640663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67150 + ... + 100191.

It is an arithmetic number, because the mean of its divisors is an integer number (460859868).

Almost surely, 2^2764640661 is an apocalyptic number.

It is an amenable number.

2764640661 is a deficient number, since it is larger than the sum of its proper divisors (922238283).

2764640661 is a wasteful number, since it uses less digits than its factorization.

2764640661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172851.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 2764640661 is about 52579.8503326132. The cubic root of 2764640661 is about 1403.5015514363.

The spelling of 2764640661 in words is "two billion, seven hundred sixty-four million, six hundred forty thousand, six hundred sixty-one".