166597659270 has 576 divisors, whose sum is σ = 564216606720. Its totient is φ = 33819641856.

The previous prime is 166597659197. The next prime is 166597659281. The reversal of 166597659270 is 72956795661.

166597659270 is a `hidden beast` number, since 16 + 6 + 597 + 6 + 5 + 9 + 27 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166597659198 and 166597659207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 136219879 + ... + 136221101.

It is an arithmetic number, because the mean of its divisors is an integer number (979542720).

Almost surely, 2^166597659270 is an apocalyptic number.

166597659270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166597659270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282108303360).

166597659270 is an abundant number, since it is smaller than the sum of its proper divisors (397618947450).

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

166597659270 is a wasteful number, since it uses less digits than its factorization.

166597659270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 42865200, while the sum is 63.

The spelling of 166597659270 in words is "one hundred sixty-six billion, five hundred ninety-seven million, six hundred fifty-nine thousand, two hundred seventy".