163866601 has 4 divisors (see below), whose sum is σ = 164313472. Its totient is φ = 163419732.

The previous prime is 163866551. The next prime is 163866613. The reversal of 163866601 is 106668361.

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 a cyclic number.

It is not a de Polignac number, because 163866601 - 2¹¹ = 163864553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163866641) 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, 222885 + ... + 223618.

It is an arithmetic number, because the mean of its divisors is an integer number (41078368).

Almost surely, 2^163866601 is an apocalyptic number.

It is an amenable number.

163866601 is a deficient number, since it is larger than the sum of its proper divisors (446871).

163866601 is an equidigital number, since it uses as much as digits as its factorization.

163866601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446870.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 163866601 is about 12801.0390593889. The cubic root of 163866601 is about 547.2219153120.

The spelling of 163866601 in words is "one hundred sixty-three million, eight hundred sixty-six thousand, six hundred one".