166940767266 has 96 divisors (see below), whose sum is σ = 421077787200. Its totient is φ = 43732692864.

The previous prime is 166940767243. The next prime is 166940767283. The reversal of 166940767266 is 662767049661.

It is a super-2 number, since 2×166940767266² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 422905 + ... + 716051.

It is an arithmetic number, because the mean of its divisors is an integer number (4386226950).

Almost surely, 2^166940767266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166940767266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210538893600).

166940767266 is an abundant number, since it is smaller than the sum of its proper divisors (254137019934).

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

166940767266 is a wasteful number, since it uses less digits than its factorization.

166940767266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293328 (or 293321 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 60.

The spelling of 166940767266 in words is "one hundred sixty-six billion, nine hundred forty million, seven hundred sixty-seven thousand, two hundred sixty-six".