166425487618 has 64 divisors (see below), whose sum is σ = 285568496640. Its totient is φ = 72162275328.

The previous prime is 166425487573. The next prime is 166425487699. The reversal of 166425487618 is 816784524661.

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, 9108580 + ... + 9126832.

It is an arithmetic number, because the mean of its divisors is an integer number (4462007760).

Almost surely, 2^166425487618 is an apocalyptic number.

166425487618 is a deficient number, since it is larger than the sum of its proper divisors (119143009022).

166425487618 is a wasteful number, since it uses less digits than its factorization.

166425487618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18563.

The product of its digits is 15482880, while the sum is 58.

The spelling of 166425487618 in words is "one hundred sixty-six billion, four hundred twenty-five million, four hundred eighty-seven thousand, six hundred eighteen".