11661166061570 has 32 divisors (see below), whose sum is σ = 21177661680000. Its totient is φ = 4622968221696.

The previous prime is 11661166061561. The next prime is 11661166061653. The reversal of 11661166061570 is 7516066116611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10889120 + ... + 11911979.

It is an arithmetic number, because the mean of its divisors is an integer number (661801927500).

Almost surely, 2^{11661166061570} is an apocalyptic number.

11661166061570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11661166061570 is a deficient number, since it is larger than the sum of its proper divisors (9516495618430).

11661166061570 is a wasteful number, since it uses less digits than its factorization.

11661166061570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22801562.

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 11661166061570 in words is "eleven trillion, six hundred sixty-one billion, one hundred sixty-six million, sixty-one thousand, five hundred seventy".