666040361 has 16 divisors (see below), whose sum is σ = 791831040. Its totient is φ = 548130240.

The previous prime is 666040351. The next prime is 666040369. The reversal of 666040361 is 163040666.

It is a de Polignac number, because none of the positive numbers 2^k-666040361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666040369) 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, 27680 + ... + 45806.

It is an arithmetic number, because the mean of its divisors is an integer number (49489440).

Almost surely, 2^666040361 is an apocalyptic number.

It is an amenable number.

666040361 is a deficient number, since it is larger than the sum of its proper divisors (125790679).

666040361 is a wasteful number, since it uses less digits than its factorization.

666040361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18344.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 666040361 is about 25807.7577677721. The cubic root of 666040361 is about 873.3068148265.

The spelling of 666040361 in words is "six hundred sixty-six million, forty thousand, three hundred sixty-one".