161466601 has 4 divisors (see below), whose sum is σ = 168486912. Its totient is φ = 154446292.

The previous prime is 161466563. The next prime is 161466607. The reversal of 161466601 is 106664161.

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 161466601 - 2⁹ = 161466089 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161466607) 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, 3510121 + ... + 3510166.

It is an arithmetic number, because the mean of its divisors is an integer number (42121728).

Almost surely, 2^161466601 is an apocalyptic number.

It is an amenable number.

161466601 is a deficient number, since it is larger than the sum of its proper divisors (7020311).

161466601 is an equidigital number, since it uses as much as digits as its factorization.

161466601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020310.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 161466601 is about 12706.9508931136. The cubic root of 161466601 is about 544.5372173327.

The spelling of 161466601 in words is "one hundred sixty-one million, four hundred sixty-six thousand, six hundred one".