2666330641 has 16 divisors (see below), whose sum is σ = 2902419520. Its totient is φ = 2434743360.

The previous prime is 2666330587. The next prime is 2666330671. The reversal of 2666330641 is 1460336662.

It is a cyclic number.

It is not a de Polignac number, because 2666330641 - 2⁹ = 2666330129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2666330641.

It is not an unprimeable number, because it can be changed into a prime (2666330671) 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, 1250146 + ... + 1252276.

It is an arithmetic number, because the mean of its divisors is an integer number (181401220).

Almost surely, 2^2666330641 is an apocalyptic number.

It is an amenable number.

2666330641 is a deficient number, since it is larger than the sum of its proper divisors (236088879).

2666330641 is a wasteful number, since it uses less digits than its factorization.

2666330641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136.

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 2666330641 is about 51636.5242924037. The cubic root of 2666330641 is about 1386.6642994584.

The spelling of 2666330641 in words is "two billion, six hundred sixty-six million, three hundred thirty thousand, six hundred forty-one".