166833501666 has 64 divisors (see below), whose sum is σ = 379277875200. Its totient is φ = 48498958656.

The previous prime is 166833501619. The next prime is 166833501727. The reversal of 166833501666 is 666105338661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390525 + ... + 697263.

It is an arithmetic number, because the mean of its divisors is an integer number (5926216800).

Almost surely, 2^166833501666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166833501666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189638937600).

166833501666 is an abundant number, since it is smaller than the sum of its proper divisors (212444373534).

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

166833501666 is a wasteful number, since it uses less digits than its factorization.

166833501666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307143.

The product of its (nonzero) digits is 2799360, while the sum is 51.

It can be divided in two parts, 16683350166 and 6, that multiplied together give a square (100100100996 = 316386²).

The spelling of 166833501666 in words is "one hundred sixty-six billion, eight hundred thirty-three million, five hundred one thousand, six hundred sixty-six".