166016901 has 4 divisors (see below), whose sum is σ = 221355872. Its totient is φ = 110677932.

The previous prime is 166016899. The next prime is 166016911. The reversal of 166016901 is 109610661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 166016901 - 2¹ = 166016899 is a prime.

It is a super-2 number, since 2×166016901² = 55123222835287602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166016911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27669481 + ... + 27669486.

It is an arithmetic number, because the mean of its divisors is an integer number (55338968).

Almost surely, 2^166016901 is an apocalyptic number.

It is an amenable number.

166016901 is a deficient number, since it is larger than the sum of its proper divisors (55338971).

166016901 is an equidigital number, since it uses as much as digits as its factorization.

166016901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55338970.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 166016901 is about 12884.7545960333. The cubic root of 166016901 is about 549.6051171052.

The spelling of 166016901 in words is "one hundred sixty-six million, sixteen thousand, nine hundred one".