166157000661 has 8 divisors (see below), whose sum is σ = 221778104544. Its totient is φ = 110653615280.

The previous prime is 166157000641. The next prime is 166157000749. The reversal of 166157000661 is 166000751661.

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 166157000661 - 2²³ = 166148612053 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166157000641) 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, 29426331 + ... + 29431976.

It is an arithmetic number, because the mean of its divisors is an integer number (27722263068).

Almost surely, 2^166157000661 is an apocalyptic number.

It is an amenable number.

166157000661 is a deficient number, since it is larger than the sum of its proper divisors (55621103883).

166157000661 is an equidigital number, since it uses as much as digits as its factorization.

166157000661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58859251.

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 166157000661 in words is "one hundred sixty-six billion, one hundred fifty-seven million, six hundred sixty-one", and thus it is an aban number.