666850077 has 24 divisors (see below), whose sum is σ = 1002610336. Its totient is φ = 442917072.

The previous prime is 666850073. The next prime is 666850153. The reversal of 666850077 is 770058666.

It is not a de Polignac number, because 666850077 - 2² = 666850073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666850073) 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 23 ways as a sum of consecutive naturals, for example, 62358 + ... + 72264.

Almost surely, 2^666850077 is an apocalyptic number.

It is an amenable number.

666850077 is a deficient number, since it is larger than the sum of its proper divisors (335760259).

666850077 is an equidigital number, since it uses as much as digits as its factorization.

666850077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10199 (or 10187 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 666850077 is about 25823.4404562986. The cubic root of 666850077 is about 873.6605692329.

The spelling of 666850077 in words is "six hundred sixty-six million, eight hundred fifty thousand, seventy-seven".