666123065 has 8 divisors (see below), whose sum is σ = 810606528. Its totient is φ = 525392560.

The previous prime is 666123047. The next prime is 666123083. The reversal of 666123065 is 560321666.

It is an interprime number because it is at equal distance from previous prime (666123047) and next prime (666123083).

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

It is not a de Polignac number, because 666123065 - 2¹² = 666118969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937847 + ... + 938556.

It is an arithmetic number, because the mean of its divisors is an integer number (101325816).

Almost surely, 2^666123065 is an apocalyptic number.

It is an amenable number.

666123065 is a deficient number, since it is larger than the sum of its proper divisors (144483463).

666123065 is a wasteful number, since it uses less digits than its factorization.

666123065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876479.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 666123065 is about 25809.3600269360. The cubic root of 666123065 is about 873.3429602724.

The spelling of 666123065 in words is "six hundred sixty-six million, one hundred twenty-three thousand, sixty-five".