2666402690 has 64 divisors (see below), whose sum is σ = 5714565120. Its totient is φ = 876510720.

The previous prime is 2666402681. The next prime is 2666402699. The reversal of 2666402690 is 962046662.

2666402690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2666402681) and next prime (2666402699).

It is a super-2 number, since 2×2666402690² = 14219406610478472200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666402699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230894 + ... + 242166.

It is an arithmetic number, because the mean of its divisors is an integer number (89290080).

Almost surely, 2^2666402690 is an apocalyptic number.

2666402690 is an abundant number, since it is smaller than the sum of its proper divisors (3048162430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666402690 is a wasteful number, since it uses less digits than its factorization.

2666402690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11427.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 2666402690 is about 51637.2219430906. The cubic root of 2666402690 is about 1386.6767893918.

The spelling of 2666402690 in words is "two billion, six hundred sixty-six million, four hundred two thousand, six hundred ninety".