18666461425 has 12 divisors (see below), whose sum is σ = 23164549120. Its totient is φ = 14921467920.

The previous prime is 18666461413. The next prime is 18666461503. The reversal of 18666461425 is 52416466681.

It is not a de Polignac number, because 18666461425 - 2²¹ = 18664364273 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259917 + ... + 323866.

Almost surely, 2^18666461425 is an apocalyptic number.

It is an amenable number.

18666461425 is a deficient number, since it is larger than the sum of its proper divisors (4498087695).

18666461425 is a wasteful number, since it uses less digits than its factorization.

18666461425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585072 (or 585067 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 49.

The spelling of 18666461425 in words is "eighteen billion, six hundred sixty-six million, four hundred sixty-one thousand, four hundred twenty-five".