166611061 has 8 divisors (see below), whose sum is σ = 172500120. Its totient is φ = 160731648.

The previous prime is 166611047. The next prime is 166611073. The reversal of 166611061 is 160116661.

It can be written as a sum of positive squares in 4 ways, for example, as 63202500 + 103408561 = 7950^2 + 10169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166611061 - 2²³ = 158222453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166611001) 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, 67725 + ... + 70141.

It is an arithmetic number, because the mean of its divisors is an integer number (21562515).

Almost surely, 2^166611061 is an apocalyptic number.

It is an amenable number.

166611061 is a deficient number, since it is larger than the sum of its proper divisors (5889059).

166611061 is a wasteful number, since it uses less digits than its factorization.

166611061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4823.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 166611061 is about 12907.7907094901. The cubic root of 166611061 is about 550.2599993862.

The spelling of 166611061 in words is "one hundred sixty-six million, six hundred eleven thousand, sixty-one".