166011563 has 8 divisors (see below), whose sum is σ = 172836768. Its totient is φ = 159309504.

The previous prime is 166011557. The next prime is 166011623. The reversal of 166011563 is 365110661.

166011563 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 166011563 - 2¹² = 166007467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166011533) 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, 28031 + ... + 33432.

It is an arithmetic number, because the mean of its divisors is an integer number (21604596).

Almost surely, 2^166011563 is an apocalyptic number.

166011563 is a deficient number, since it is larger than the sum of its proper divisors (6825205).

166011563 is an equidigital number, since it uses as much as digits as its factorization.

166011563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61573.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 166011563 is about 12884.5474503376. The cubic root of 166011563 is about 549.5992264930.

The spelling of 166011563 in words is "one hundred sixty-six million, eleven thousand, five hundred sixty-three".