166311487 has 8 divisors (see below), whose sum is σ = 172722176. Its totient is φ = 160016472.

The previous prime is 166311473. The next prime is 166311517. The reversal of 166311487 is 784113661.

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 166311487 - 2⁷ = 166311359 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 (166311787) 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, 25983 + ... + 31744.

It is an arithmetic number, because the mean of its divisors is an integer number (21590272).

Almost surely, 2^166311487 is an apocalyptic number.

166311487 is a deficient number, since it is larger than the sum of its proper divisors (6410689).

166311487 is an equidigital number, since it uses as much as digits as its factorization.

166311487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57837.

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

The square root of 166311487 is about 12896.1811013959. The cubic root of 166311487 is about 549.9300043155.

The spelling of 166311487 in words is "one hundred sixty-six million, three hundred eleven thousand, four hundred eighty-seven".