161066401 has 16 divisors (see below), whose sum is σ = 179942400. Its totient is φ = 143458128.

The previous prime is 161066371. The next prime is 161066407. The reversal of 161066401 is 104660161.

161066401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161066401 - 2⁵ = 161066369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161066407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22660 + ... + 28906.

It is an arithmetic number, because the mean of its divisors is an integer number (11246400).

Almost surely, 2^161066401 is an apocalyptic number.

It is an amenable number.

161066401 is a deficient number, since it is larger than the sum of its proper divisors (18875999).

161066401 is a wasteful number, since it uses less digits than its factorization.

161066401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6348.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 161066401 is about 12691.1938366727. The cubic root of 161066401 is about 544.0869609846.

The spelling of 161066401 in words is "one hundred sixty-one million, sixty-six thousand, four hundred one".