1166600155605 has 32 divisors (see below), whose sum is σ = 1976470274304. Its totient is φ = 585554236416.

The previous prime is 1166600155603. The next prime is 1166600155657. The reversal of 1166600155605 is 5065510066611.

It is not a de Polignac number, because 1166600155605 - 2¹ = 1166600155603 is a prime.

It is a super-2 number, since 2×1166600155605² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166600155601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4717552 + ... + 4958678.

It is an arithmetic number, because the mean of its divisors is an integer number (61764696072).

Almost surely, 2^{1166600155605} is an apocalyptic number.

1166600155605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1166600155605 is a deficient number, since it is larger than the sum of its proper divisors (809870118699).

1166600155605 is a wasteful number, since it uses less digits than its factorization.

1166600155605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260125.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 1166600155605 in words is "one trillion, one hundred sixty-six billion, six hundred million, one hundred fifty-five thousand, six hundred five".