166780118078 has 64 divisors (see below), whose sum is σ = 294468894720. Its totient is φ = 69357254400.

The previous prime is 166780118051. The next prime is 166780118101. The reversal of 166780118078 is 870811087661.

It is a happy number.

It is a super-2 number, since 2×166780118078² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100287875 + ... + 100289537.

It is an arithmetic number, because the mean of its divisors is an integer number (4601076480).

Almost surely, 2^166780118078 is an apocalyptic number.

166780118078 is a deficient number, since it is larger than the sum of its proper divisors (127688776642).

166780118078 is a wasteful number, since it uses less digits than its factorization.

166780118078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553.

The product of its (nonzero) digits is 903168, while the sum is 53.

The spelling of 166780118078 in words is "one hundred sixty-six billion, seven hundred eighty million, one hundred eighteen thousand, seventy-eight".