166667998464 has 144 divisors (see below), whose sum is σ = 537672891840. Its totient is φ = 50505431040.

The previous prime is 166667998447. The next prime is 166667998481. The reversal of 166667998464 is 464899766661.

It is an interprime number because it is at equal distance from previous prime (166667998447) and next prime (166667998481).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 166667998392 and 166667998401.

It is a congruent number.

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, 1020007 + ... + 1172070.

Almost surely, 2^166667998464 is an apocalyptic number.

It is an amenable number.

166667998464 is an abundant number, since it is smaller than the sum of its proper divisors (371004893376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166667998464 is a wasteful number, since it uses less digits than its factorization.

166667998464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192113 (or 2192093 counting only the distinct ones).

The product of its digits is 564350976, while the sum is 72.

The spelling of 166667998464 in words is "one hundred sixty-six billion, six hundred sixty-seven million, nine hundred ninety-eight thousand, four hundred sixty-four".