166588640281540 has 48 divisors (see below), whose sum is σ = 353177436616704. Its totient is φ = 66000765600000.

The previous prime is 166588640281537. The next prime is 166588640281589. The reversal of 166588640281540 is 45182046885661.

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, 53037586 + ... + 56090665.

It is an arithmetic number, because the mean of its divisors is an integer number (7357863262848).

Almost surely, 2^{166588640281540} is an apocalyptic number.

166588640281540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166588640281540 is an abundant number, since it is smaller than the sum of its proper divisors (186588796335164).

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

166588640281540 is a wasteful number, since it uses less digits than its factorization.

166588640281540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109128988 (or 109128986 counting only the distinct ones).

The product of its (nonzero) digits is 88473600, while the sum is 64.

The spelling of 166588640281540 in words is "one hundred sixty-six trillion, five hundred eighty-eight billion, six hundred forty million, two hundred eighty-one thousand, five hundred forty".