166601287 has 8 divisors (see below), whose sum is σ = 169205760. Its totient is φ = 164004120.

The previous prime is 166601233. The next prime is 166601311. The reversal of 166601287 is 782106661.

166601287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 166601287 - 2²³ = 158212679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166601587) 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, 59914 + ... + 62632.

It is an arithmetic number, because the mean of its divisors is an integer number (21150720).

Almost surely, 2^166601287 is an apocalyptic number.

166601287 is a deficient number, since it is larger than the sum of its proper divisors (2604473).

166601287 is an equidigital number, since it uses as much as digits as its factorization.

166601287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3653.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 166601287 is about 12907.4120953815. The cubic root of 166601287 is about 550.2492391034.

The spelling of 166601287 in words is "one hundred sixty-six million, six hundred one thousand, two hundred eighty-seven".