1023566166 has 32 divisors (see below), whose sum is σ = 2599534080. Its totient is φ = 292447368.

The previous prime is 1023566149. The next prime is 1023566177. The reversal of 1023566166 is 6616653201.

1023566166 is a `hidden beast` number, since 1 + 0 + 2 + 35 + 6 + 616 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1023566166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1353546 + ... + 1354301.

It is an arithmetic number, because the mean of its divisors is an integer number (81235440).

Almost surely, 2^1023566166 is an apocalyptic number.

1023566166 is an abundant number, since it is smaller than the sum of its proper divisors (1575967914).

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

1023566166 is a wasteful number, since it uses less digits than its factorization.

1023566166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707865 (or 2707859 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1023566166 is about 31993.2206256263. The cubic root of 1023566166 is about 1007.7944769476.

The spelling of 1023566166 in words is "one billion, twenty-three million, five hundred sixty-six thousand, one hundred sixty-six".