166021564202984 has 48 divisors (see below), whose sum is σ = 362117569913280. Its totient is φ = 71151271870560.

The previous prime is 166021564202983. The next prime is 166021564203017. The reversal of 166021564202984 is 489202465120661.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (166021564202983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31916369 + ... + 36751839.

It is an arithmetic number, because the mean of its divisors is an integer number (7544116039860).

Almost surely, 2^{166021564202984} is an apocalyptic number.

166021564202984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166021564202984 is an abundant number, since it is smaller than the sum of its proper divisors (196096005710296).

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

166021564202984 is a wasteful number, since it uses less digits than its factorization.

166021564202984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4923078 (or 4923067 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 166021564202984 in words is "one hundred sixty-six trillion, twenty-one billion, five hundred sixty-four million, two hundred two thousand, nine hundred eighty-four".