166040636620 has 12 divisors (see below), whose sum is σ = 348685336944. Its totient is φ = 66416254640.

The previous prime is 166040636581. The next prime is 166040636633. The reversal of 166040636620 is 26636040661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4151015896 + ... + 4151015935.

It is an arithmetic number, because the mean of its divisors is an integer number (29057111412).

Almost surely, 2^166040636620 is an apocalyptic number.

166040636620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166040636620 is an abundant number, since it is smaller than the sum of its proper divisors (182644700324).

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

166040636620 is a wasteful number, since it uses less digits than its factorization.

166040636620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8302031840 (or 8302031838 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 166040636620 in words is "one hundred sixty-six billion, forty million, six hundred thirty-six thousand, six hundred twenty".