2666491992 has 48 divisors (see below), whose sum is σ = 7224155640. Its totient is φ = 888534528.

The previous prime is 2666491991. The next prime is 2666491999. The reversal of 2666491992 is 2991946662.

It is a happy number.

It is a super-2 number, since 2×2666491992² = 14220359086800256128, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666491991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 367423 + ... + 374609.

Almost surely, 2^2666491992 is an apocalyptic number.

It is an amenable number.

2666491992 is an abundant number, since it is smaller than the sum of its proper divisors (4557663648).

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

2666491992 is a wasteful number, since it uses less digits than its factorization.

2666491992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12352 (or 12345 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 2666491992 is about 51638.0866415478. The cubic root of 2666491992 is about 1386.6922698778.

The spelling of 2666491992 in words is "two billion, six hundred sixty-six million, four hundred ninety-one thousand, nine hundred ninety-two".