166584402405388 has 48 divisors (see below), whose sum is σ = 322231959713664. Its totient is φ = 74720599725440.

The previous prime is 166584402405349. The next prime is 166584402405431. The reversal of 166584402405388 is 883504204485661.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 23483170 + ... + 29742697.

It is an arithmetic number, because the mean of its divisors is an integer number (6713165827368).

Almost surely, 2^{166584402405388} is an apocalyptic number.

It is an amenable number.

166584402405388 is a deficient number, since it is larger than the sum of its proper divisors (155647557308276).

166584402405388 is a wasteful number, since it uses less digits than its factorization.

166584402405388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53226822 (or 53226820 counting only the distinct ones).

The product of its (nonzero) digits is 176947200, while the sum is 64.

The spelling of 166584402405388 in words is "one hundred sixty-six trillion, five hundred eighty-four billion, four hundred two million, four hundred five thousand, three hundred eighty-eight".