166701644340 has 288 divisors, whose sum is σ = 611846645760. Its totient is φ = 33133013760.

The previous prime is 166701644311. The next prime is 166701644399. The reversal of 166701644340 is 43446107661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 166701644292 and 166701644301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1097551 + ... + 1240169.

It is an arithmetic number, because the mean of its divisors is an integer number (2124467520).

Almost surely, 2^166701644340 is an apocalyptic number.

166701644340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166701644340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305923322880).

166701644340 is an abundant number, since it is smaller than the sum of its proper divisors (445145001420).

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

166701644340 is a wasteful number, since it uses less digits than its factorization.

166701644340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142683 (or 142670 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 166701644340 in words is "one hundred sixty-six billion, seven hundred one million, six hundred forty-four thousand, three hundred forty".