166100665550550 has 96 divisors (see below), whose sum is σ = 412185083609088. Its totient is φ = 44266049118720.

The previous prime is 166100665550549. The next prime is 166100665550551. The reversal of 166100665550550 is 55055566001661.

It is an interprime number because it is at equal distance from previous prime (166100665550549) and next prime (166100665550551).

It is a junction number, because it is equal to n+sod(n) for n = 166100665550493 and 166100665550502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166100665550551) 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 47 ways as a sum of consecutive naturals, for example, 5029831339 + ... + 5029864361.

It is an arithmetic number, because the mean of its divisors is an integer number (4293594620928).

Almost surely, 2^{166100665550550} is an apocalyptic number.

166100665550550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166100665550550 is an abundant number, since it is smaller than the sum of its proper divisors (246084418058538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166100665550550 is a wasteful number, since it uses less digits than its factorization.

166100665550550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52814 (or 52809 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 166100665550550 in words is "one hundred sixty-six trillion, one hundred billion, six hundred sixty-five million, five hundred fifty thousand, five hundred fifty".