2661168990 has 16 divisors (see below), whose sum is σ = 6386805648. Its totient is φ = 709645056.

The previous prime is 2661168959. The next prime is 2661169003. The reversal of 2661168990 is 998611662.

It is a Curzon number.

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, 44352787 + ... + 44352846.

It is an arithmetic number, because the mean of its divisors is an integer number (399175353).

Almost surely, 2^2661168990 is an apocalyptic number.

2661168990 is an abundant number, since it is smaller than the sum of its proper divisors (3725636658).

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

2661168990 is a wasteful number, since it uses less digits than its factorization.

2661168990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88705643.

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 2661168990 is about 51586.5194600295. The cubic root of 2661168990 is about 1385.7689240358.

The spelling of 2661168990 in words is "two billion, six hundred sixty-one million, one hundred sixty-eight thousand, nine hundred ninety".