666089115 has 8 divisors (see below), whose sum is σ = 1065742608. Its totient is φ = 355247520.

The previous prime is 666089101. The next prime is 666089119. The reversal of 666089115 is 511980666.

It is a happy number.

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

It is not a de Polignac number, because 666089115 - 2⁷ = 666088987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666089119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22202956 + ... + 22202985.

It is an arithmetic number, because the mean of its divisors is an integer number (133217826).

Almost surely, 2^666089115 is an apocalyptic number.

666089115 is a deficient number, since it is larger than the sum of its proper divisors (399653493).

666089115 is a wasteful number, since it uses less digits than its factorization.

666089115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44405949.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 666089115 is about 25808.7023114298. The cubic root of 666089115 is about 873.3281229254.

The spelling of 666089115 in words is "six hundred sixty-six million, eighty-nine thousand, one hundred fifteen".