2106616156665 has 16 divisors (see below), whose sum is σ = 3370610136768. Its totient is φ = 1123520521536.

The previous prime is 2106616156657. The next prime is 2106616156669. The reversal of 2106616156665 is 5666516166012.

It is not a de Polignac number, because 2106616156665 - 2³ = 2106616156657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2106616156669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2067459 + ... + 2913351.

It is an arithmetic number, because the mean of its divisors is an integer number (210663133548).

Almost surely, 2^{2106616156665} is an apocalyptic number.

It is an amenable number.

2106616156665 is a deficient number, since it is larger than the sum of its proper divisors (1263993980103).

2106616156665 is a wasteful number, since it uses less digits than its factorization.

2106616156665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011928.

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 2106616156665 in words is "two trillion, one hundred six billion, six hundred sixteen million, one hundred fifty-six thousand, six hundred sixty-five".