166889235340 has 24 divisors (see below), whose sum is σ = 350523491472. Its totient is φ = 66745008960.

The previous prime is 166889235329. The next prime is 166889235343. The reversal of 166889235340 is 43532988661.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (166889235343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539146 + ... + 790225.

It is an arithmetic number, because the mean of its divisors is an integer number (14605145478).

Almost surely, 2^166889235340 is an apocalyptic number.

166889235340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166889235340 is an abundant number, since it is smaller than the sum of its proper divisors (183634256132).

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

166889235340 is a wasteful number, since it uses less digits than its factorization.

166889235340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335657 (or 1335655 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 166889235340 in words is "one hundred sixty-six billion, eight hundred eighty-nine million, two hundred thirty-five thousand, three hundred forty".