166060661 has 8 divisors (see below), whose sum is σ = 178934784. Its totient is φ = 153200880.

The previous prime is 166060637. The next prime is 166060679.

166060661 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166060661 is a prime.

It is a super-2 number, since 2×166060661² = 55152286263513842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166060691) 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, 42200 + ... + 45966.

It is an arithmetic number, because the mean of its divisors is an integer number (22366848).

Almost surely, 2^166060661 is an apocalyptic number.

It is an amenable number.

166060661 is a deficient number, since it is larger than the sum of its proper divisors (12874123).

166060661 is a wasteful number, since it uses less digits than its factorization.

166060661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7171.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 166060661 is about 12886.4526150528. The cubic root of 166060661 is about 549.6534025647.

The spelling of 166060661 in words is "one hundred sixty-six million, sixty thousand, six hundred sixty-one".