101666065000 has 40 divisors (see below), whose sum is σ = 238203602010. Its totient is φ = 40666424000.

The previous prime is 101666064979. The next prime is 101666065103. The reversal of 101666065000 is 560666101.

It can be written as a sum of positive squares in 5 ways, for example, as 20861180356 + 80804884644 = 144434^2 + 284262^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10161607 + ... + 10171606.

Almost surely, 2^101666065000 is an apocalyptic number.

101666065000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101666065000 is an abundant number, since it is smaller than the sum of its proper divisors (136537537010).

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

101666065000 is an equidigital number, since it uses as much as digits as its factorization.

101666065000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20333239 (or 20333220 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 101666065000 in words is "one hundred one billion, six hundred sixty-six million, sixty-five thousand".