166577768043990 has 32 divisors (see below), whose sum is σ = 399791765283840. Its totient is φ = 44420169036384.

The previous prime is 166577768043959. The next prime is 166577768044007. The reversal of 166577768043990 is 99340867775661.

It is a congruent number.

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, 33186054 + ... + 37874393.

It is an arithmetic number, because the mean of its divisors is an integer number (12493492665120).

Almost surely, 2^{166577768043990} is an apocalyptic number.

166577768043990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166577768043990 is an abundant number, since it is smaller than the sum of its proper divisors (233213997239850).

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

166577768043990 is a wasteful number, since it uses less digits than its factorization.

166577768043990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71138596.

The product of its (nonzero) digits is 2880541440, while the sum is 78.

The spelling of 166577768043990 in words is "one hundred sixty-six trillion, five hundred seventy-seven billion, seven hundred sixty-eight million, forty-three thousand, nine hundred ninety".