2661972986 has 8 divisors (see below), whose sum is σ = 4016869920. Its totient is φ = 1323016348.

The previous prime is 2661972983. The next prime is 2661973021. The reversal of 2661972986 is 6892791662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2661972986² = 14172200356387512392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2661972983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3984656 + ... + 3985323.

It is an arithmetic number, because the mean of its divisors is an integer number (502108740).

Almost surely, 2^2661972986 is an apocalyptic number.

2661972986 is a deficient number, since it is larger than the sum of its proper divisors (1354896934).

2661972986 is a wasteful number, since it uses less digits than its factorization.

2661972986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970148.

The product of its digits is 3919104, while the sum is 56.

The square root of 2661972986 is about 51594.3115662958. The cubic root of 2661972986 is about 1385.9084667821.

The spelling of 2661972986 in words is "two billion, six hundred sixty-one million, nine hundred seventy-two thousand, nine hundred eighty-six".