2166706650993 has 8 divisors (see below), whose sum is σ = 2918725111008. Its totient is φ = 1429579645824.

The previous prime is 2166706650967. The next prime is 2166706651033. The reversal of 2166706650993 is 3990566076612.

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

It is not a de Polignac number, because 2166706650993 - 2⁶ = 2166706650929 is a prime.

It is a super-2 number, since 2×2166706650993² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2166706650193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3722863371 + ... + 3722863952.

It is an arithmetic number, because the mean of its divisors is an integer number (364840638876).

Almost surely, 2^{2166706650993} is an apocalyptic number.

It is an amenable number.

2166706650993 is a deficient number, since it is larger than the sum of its proper divisors (752018460015).

2166706650993 is an equidigital number, since it uses as much as digits as its factorization.

2166706650993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7445727423.

The product of its (nonzero) digits is 22044960, while the sum is 60.

The spelling of 2166706650993 in words is "two trillion, one hundred sixty-six billion, seven hundred six million, six hundred fifty thousand, nine hundred ninety-three".