2166965770 has 32 divisors (see below), whose sum is σ = 4151995200. Its totient is φ = 811933056.

The previous prime is 2166965767. The next prime is 2166965777. The reversal of 2166965770 is 775696612.

It is not an unprimeable number, because it can be changed into a prime (2166965777) 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, 47164 + ... + 80983.

It is an arithmetic number, because the mean of its divisors is an integer number (129749850).

Almost surely, 2^2166965770 is an apocalyptic number.

2166965770 is a deficient number, since it is larger than the sum of its proper divisors (1985029430).

2166965770 is a wasteful number, since it uses less digits than its factorization.

2166965770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128262.

The product of its (nonzero) digits is 952560, while the sum is 49.

The square root of 2166965770 is about 46550.6795868761. The cubic root of 2166965770 is about 1294.0488874507.

The spelling of 2166965770 in words is "two billion, one hundred sixty-six million, nine hundred sixty-five thousand, seven hundred seventy".