2100661276 has 24 divisors (see below), whose sum is σ = 4251945600. Its totient is φ = 889435632.

The previous prime is 2100661267. The next prime is 2100661291. The reversal of 2100661276 is 6721660012.

It is a happy 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, 449626 + ... + 454273.

It is an arithmetic number, because the mean of its divisors is an integer number (177164400).

Almost surely, 2^2100661276 is an apocalyptic number.

It is an amenable number.

2100661276 is an abundant number, since it is smaller than the sum of its proper divisors (2151284324).

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

2100661276 is a wasteful number, since it uses less digits than its factorization.

2100661276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903993 (or 903991 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 2100661276 is about 45832.9714943293. The cubic root of 2100661276 is about 1280.7135661618.

The spelling of 2100661276 in words is "two billion, one hundred million, six hundred sixty-one thousand, two hundred seventy-six".