666041599 has 8 divisors (see below), whose sum is σ = 701792000. Its totient is φ = 630360792.

The previous prime is 666041543. The next prime is 666041609. The reversal of 666041599 is 995140666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666041599 - 2⁹ = 666041087 is a prime.

It is a super-2 number, since 2×666041599² = 887222823196953602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666048599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2872 + ... + 36610.

It is an arithmetic number, because the mean of its divisors is an integer number (87724000).

Almost surely, 2^666041599 is an apocalyptic number.

666041599 is a deficient number, since it is larger than the sum of its proper divisors (35750401).

666041599 is a wasteful number, since it uses less digits than its factorization.

666041599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34797.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 666041599 is about 25807.7817527970. The cubic root of 666041599 is about 873.3073559114.

The spelling of 666041599 in words is "six hundred sixty-six million, forty-one thousand, five hundred ninety-nine".