2660666900 has 72 divisors (see below), whose sum is σ = 6096276480. Its totient is φ = 1005143040.

The previous prime is 2660666893. The next prime is 2660666903. The reversal of 2660666900 is 96660662.

It is a super-2 number, since 2×2660666900² = 14158296705511220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660666903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 668717 + ... + 672683.

Almost surely, 2^2660666900 is an apocalyptic number.

2660666900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2660666900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3048138240).

2660666900 is an abundant number, since it is smaller than the sum of its proper divisors (3435609580).

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

2660666900 is a wasteful number, since it uses less digits than its factorization.

2660666900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4353 (or 4346 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 2660666900 is about 51581.6527459134. The cubic root of 2660666900 is about 1385.6817662887.

The spelling of 2660666900 in words is "two billion, six hundred sixty million, six hundred sixty-six thousand, nine hundred".