166266726 has 16 divisors (see below), whose sum is σ = 340644528. Its totient is φ = 54070400.

The previous prime is 166266721. The next prime is 166266743. The reversal of 166266726 is 627662661.

166266726 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166266721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337695 + ... + 338186.

It is an arithmetic number, because the mean of its divisors is an integer number (21290283).

Almost surely, 2^166266726 is an apocalyptic number.

166266726 is an abundant number, since it is smaller than the sum of its proper divisors (174377802).

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

166266726 is a wasteful number, since it uses less digits than its factorization.

166266726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675927.

The product of its digits is 217728, while the sum is 42.

The square root of 166266726 is about 12894.4455483747. The cubic root of 166266726 is about 549.8806639161.

The spelling of 166266726 in words is "one hundred sixty-six million, two hundred sixty-six thousand, seven hundred twenty-six".