166511061 has 24 divisors (see below), whose sum is σ = 243360000. Its totient is φ = 109704672.

The previous prime is 166511057. The next prime is 166511077. The reversal of 166511061 is 160115661.

166511061 is a `hidden beast` number, since 1 + 6 + 651 + 1 + 0 + 6 + 1 = 666.

It is not a de Polignac number, because 166511061 - 2² = 166511057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166511161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 427855 + ... + 428243.

It is an arithmetic number, because the mean of its divisors is an integer number (10140000).

Almost surely, 2^166511061 is an apocalyptic number.

It is an amenable number.

166511061 is a deficient number, since it is larger than the sum of its proper divisors (76848939).

166511061 is a wasteful number, since it uses less digits than its factorization.

166511061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 166511061 is about 12903.9164984899. The cubic root of 166511061 is about 550.1498886245.

The spelling of 166511061 in words is "one hundred sixty-six million, five hundred eleven thousand, sixty-one".