166997473943040 has 320 divisors, whose sum is σ = 638818866100800. Its totient is φ = 41107070287872.

The previous prime is 166997473943023. The next prime is 166997473943059. The reversal of 166997473943040 is 40349374799661.

166997473943040 is a `hidden beast` number, since 1 + 6 + 6 + 99 + 74 + 7 + 39 + 430 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

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

It is a self number, because there is not a number n which added to its sum of digits gives 166997473943040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92026495 + ... + 93823614.

It is an arithmetic number, because the mean of its divisors is an integer number (1996308956565).

Almost surely, 2^{166997473943040} is an apocalyptic number.

166997473943040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166997473943040 is an abundant number, since it is smaller than the sum of its proper divisors (471821392157760).

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

166997473943040 is a wasteful number, since it uses less digits than its factorization.

166997473943040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185850154 (or 185850132 counting only the distinct ones).

The product of its (nonzero) digits is 740710656, while the sum is 72.

The spelling of 166997473943040 in words is "one hundred sixty-six trillion, nine hundred ninety-seven billion, four hundred seventy-three million, nine hundred forty-three thousand, forty".