166446642420026 has 32 divisors (see below), whose sum is σ = 272181516062400. Its totient is φ = 76038009949440.

The previous prime is 166446642419983. The next prime is 166446642420089. The reversal of 166446642420026 is 620024246644661.

It is a super-3 number, since 3×166446642420026³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166446642420026.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84750200 + ... + 86691923.

It is an arithmetic number, because the mean of its divisors is an integer number (8505672376950).

Almost surely, 2^{166446642420026} is an apocalyptic number.

166446642420026 is a deficient number, since it is larger than the sum of its proper divisors (105734873642374).

166446642420026 is a wasteful number, since it uses less digits than its factorization.

166446642420026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171443054.

The product of its (nonzero) digits is 15925248, while the sum is 53.

The spelling of 166446642420026 in words is "one hundred sixty-six trillion, four hundred forty-six billion, six hundred forty-two million, four hundred twenty thousand, twenty-six".