2666949156 has 36 divisors (see below), whose sum is σ = 6973921500. Its totient is φ = 858328128.

The previous prime is 2666949151. The next prime is 2666949157. The reversal of 2666949156 is 6519496662.

It can be written as a sum of positive squares in 2 ways, for example, as 2137212900 + 529736256 = 46230^2 + 23016^2 .

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

It is a super-2 number, since 2×2666949156² = 14225235601378224672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666949151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1276231 + ... + 1278318.

Almost surely, 2^2666949156 is an apocalyptic number.

It is an amenable number.

2666949156 is an abundant number, since it is smaller than the sum of its proper divisors (4306972344).

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

2666949156 is a wasteful number, since it uses less digits than its factorization.

2666949156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554588 (or 2554583 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 2666949156 is about 51642.5130682077. The cubic root of 2666949156 is about 1386.7715137633.

The spelling of 2666949156 in words is "two billion, six hundred sixty-six million, nine hundred forty-nine thousand, one hundred fifty-six".