666361201 has 4 divisors (see below), whose sum is σ = 726939504. Its totient is φ = 605782900.

The previous prime is 666361193. The next prime is 666361219. The reversal of 666361201 is 102163666.

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 666361201 - 2³ = 666361193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666361261) 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, 30289135 + ... + 30289156.

It is an arithmetic number, because the mean of its divisors is an integer number (181734876).

Almost surely, 2^666361201 is an apocalyptic number.

It is an amenable number.

666361201 is a deficient number, since it is larger than the sum of its proper divisors (60578303).

666361201 is a wasteful number, since it uses less digits than its factorization.

666361201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60578302.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 666361201 is about 25813.9729797643. The cubic root of 666361201 is about 873.4470199333.

The spelling of 666361201 in words is "six hundred sixty-six million, three hundred sixty-one thousand, two hundred one".