2166706650988 has 24 divisors (see below), whose sum is σ = 4136908688640. Its totient is φ = 984755059920.

The previous prime is 2166706650967. The next prime is 2166706651033. The reversal of 2166706650988 is 8890566076612.

It is a super-2 number, since 2×2166706650988² (a number of 25 digits) contains 22 as substring.

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, 2396656 + ... + 3174487.

It is an arithmetic number, because the mean of its divisors is an integer number (172371195360).

Almost surely, 2^{2166706650988} is an apocalyptic number.

It is an amenable number.

2166706650988 is a deficient number, since it is larger than the sum of its proper divisors (1970202037652).

2166706650988 is a wasteful number, since it uses less digits than its factorization.

2166706650988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579997 (or 5579995 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 2166706650988 in words is "two trillion, one hundred sixty-six billion, seven hundred six million, six hundred fifty thousand, nine hundred eighty-eight".