166360261155 has 64 divisors (see below), whose sum is σ = 307560457728. Its totient is φ = 75888834560.

The previous prime is 166360261139. The next prime is 166360261157. The reversal of 166360261155 is 551162063661.

It is not a de Polignac number, because 166360261155 - 2⁴ = 166360261139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166360261157) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9901672 + ... + 9918458.

It is an arithmetic number, because the mean of its divisors is an integer number (4805632152).

Almost surely, 2^166360261155 is an apocalyptic number.

166360261155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166360261155 is a deficient number, since it is larger than the sum of its proper divisors (141200196573).

166360261155 is a wasteful number, since it uses less digits than its factorization.

166360261155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20356.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 166360261155 in words is "one hundred sixty-six billion, three hundred sixty million, two hundred sixty-one thousand, one hundred fifty-five".