2661631308 has 36 divisors (see below), whose sum is σ = 7689157840. Its totient is φ = 760466016.

The previous prime is 2661631303. The next prime is 2661631373. The reversal of 2661631308 is 8031361662.

2661631308 is a `hidden beast` number, since 2 + 6 + 616 + 3 + 1 + 30 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2661631303) 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, 5280763 + ... + 5281266.

Almost surely, 2^2661631308 is an apocalyptic number.

2661631308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2661631308 is an abundant number, since it is smaller than the sum of its proper divisors (5027526532).

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

2661631308 is a wasteful number, since it uses less digits than its factorization.

2661631308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10562046 (or 10562041 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 2661631308 is about 51591.0002616735. Note that the first 3 decimals coincide. The cubic root of 2661631308 is about 1385.8491680718.

The spelling of 2661631308 in words is "two billion, six hundred sixty-one million, six hundred thirty-one thousand, three hundred eight".