661060166 has 8 divisors (see below), whose sum is σ = 1067866464. Its totient is φ = 305104680.

The previous prime is 661060157. The next prime is 661060177.

661060166 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12712670 + ... + 12712721.

It is an arithmetic number, because the mean of its divisors is an integer number (133483308).

Almost surely, 2^661060166 is an apocalyptic number.

661060166 is a deficient number, since it is larger than the sum of its proper divisors (406806298).

661060166 is a wasteful number, since it uses less digits than its factorization.

661060166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25425406.

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

The square root of 661060166 is about 25711.0903308281. The cubic root of 661060166 is about 871.1247029727.

The spelling of 661060166 in words is "six hundred sixty-one million, sixty thousand, one hundred sixty-six".