2666390140 has 24 divisors (see below), whose sum is σ = 5604569712. Its totient is φ = 1065575040.

The previous prime is 2666390119. The next prime is 2666390171. The reversal of 2666390140 is 410936662.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2666390140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38826 + ... + 82705.

It is an arithmetic number, because the mean of its divisors is an integer number (233523738).

Almost surely, 2^2666390140 is an apocalyptic number.

2666390140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2666390140 is an abundant number, since it is smaller than the sum of its proper divisors (2938179572).

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

2666390140 is a wasteful number, since it uses less digits than its factorization.

2666390140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122637 (or 122635 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 2666390140 is about 51637.1004220802. The cubic root of 2666390140 is about 1386.6746138238.

The spelling of 2666390140 in words is "two billion, six hundred sixty-six million, three hundred ninety thousand, one hundred forty".