2660422661 has 4 divisors (see below), whose sum is σ = 2865070572. Its totient is φ = 2455774752.

The previous prime is 2660422649. The next prime is 2660422663. The reversal of 2660422661 is 1662240662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 432016225 + 2228406436 = 20785^2 + 47206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2660422661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660422663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102323936 + ... + 102323961.

It is an arithmetic number, because the mean of its divisors is an integer number (716267643).

Almost surely, 2^2660422661 is an apocalyptic number.

It is an amenable number.

2660422661 is a deficient number, since it is larger than the sum of its proper divisors (204647911).

2660422661 is a wasteful number, since it uses less digits than its factorization.

2660422661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204647910.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 2660422661 is about 51579.2851927981. The cubic root of 2660422661 is about 1385.6393649036.

The spelling of 2660422661 in words is "two billion, six hundred sixty million, four hundred twenty-two thousand, six hundred sixty-one".