166626402650 has 12 divisors (see below), whose sum is σ = 309925109022. Its totient is φ = 66650561040.

The previous prime is 166626402643. The next prime is 166626402659. The reversal of 166626402650 is 56204626661.

It is a happy number.

166626402650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 136214879329 + 30411523321 = 369073^2 + 174389^2 .

It is not an unprimeable number, because it can be changed into a prime (166626402659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1666263977 + ... + 1666264076.

Almost surely, 2^166626402650 is an apocalyptic number.

166626402650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166626402650 is a deficient number, since it is larger than the sum of its proper divisors (143298706372).

166626402650 is a wasteful number, since it uses less digits than its factorization.

166626402650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332528065 (or 3332528060 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 166626402650 in words is "one hundred sixty-six billion, six hundred twenty-six million, four hundred two thousand, six hundred fifty".