2668821492 has 48 divisors (see below), whose sum is σ = 6464086272. Its totient is φ = 856394880.

The previous prime is 2668821479. The next prime is 2668821523. The reversal of 2668821492 is 2941288662.

It is a happy number.

It is a super-2 number, since 2×2668821492² = 14245216312322212128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4383 + ... + 73190.

It is an arithmetic number, because the mean of its divisors is an integer number (134668464).

Almost surely, 2^2668821492 is an apocalyptic number.

It is an amenable number.

2668821492 is an abundant number, since it is smaller than the sum of its proper divisors (3795264780).

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

2668821492 is a wasteful number, since it uses less digits than its factorization.

2668821492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77688 (or 77686 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The square root of 2668821492 is about 51660.6377428696. The cubic root of 2668821492 is about 1387.0959662479.

The spelling of 2668821492 in words is "two billion, six hundred sixty-eight million, eight hundred twenty-one thousand, four hundred ninety-two".