166808281632 has 96 divisors (see below), whose sum is σ = 469258780032. Its totient is φ = 51747784704.

The previous prime is 166808281597. The next prime is 166808281663. The reversal of 166808281632 is 236182808661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

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, 939213 + ... + 1102604.

It is an arithmetic number, because the mean of its divisors is an integer number (4888112292).

Almost surely, 2^166808281632 is an apocalyptic number.

166808281632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166808281632 is an abundant number, since it is smaller than the sum of its proper divisors (302450498400).

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

166808281632 is a wasteful number, since it uses less digits than its factorization.

166808281632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041890 (or 2041882 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 166808281632 in words is "one hundred sixty-six billion, eight hundred eight million, two hundred eighty-one thousand, six hundred thirty-two".