156866420998 has 16 divisors (see below), whose sum is σ = 269094500640. Its totient is φ = 67183307136.

The previous prime is 156866420989. The next prime is 156866421067. The reversal of 156866420998 is 899024668651.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3741661 + ... + 3783352.

It is an arithmetic number, because the mean of its divisors is an integer number (16818406290).

Almost surely, 2^156866420998 is an apocalyptic number.

156866420998 is a deficient number, since it is larger than the sum of its proper divisors (112228079642).

156866420998 is a wasteful number, since it uses less digits than its factorization.

156866420998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7526511.

The product of its (nonzero) digits is 44789760, while the sum is 64.

The spelling of 156866420998 in words is "one hundred fifty-six billion, eight hundred sixty-six million, four hundred twenty thousand, nine hundred ninety-eight".