2166706651051 has 16 divisors (see below), whose sum is σ = 2236924978560. Its totient is φ = 2097608423040.

The previous prime is 2166706651049. The next prime is 2166706651073. The reversal of 2166706651051 is 1501566076612.

It is a cyclic number.

It is not a de Polignac number, because 2166706651051 - 2¹ = 2166706651049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2166706650992 and 2166706651010.

It is not an unprimeable number, because it can be changed into a prime (2166706651091) 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, 6593221 + ... + 6914041.

It is an arithmetic number, because the mean of its divisors is an integer number (139807811160).

Almost surely, 2^{2166706651051} is an apocalyptic number.

2166706651051 is a deficient number, since it is larger than the sum of its proper divisors (70218327509).

2166706651051 is a wasteful number, since it uses less digits than its factorization.

2166706651051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322566.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 2166706651051 in words is "two trillion, one hundred sixty-six billion, seven hundred six million, six hundred fifty-one thousand, fifty-one".