667885827 has 16 divisors (see below), whose sum is σ = 1038502400. Its totient is φ = 381648456.

The previous prime is 667885769. The next prime is 667885871. The reversal of 667885827 is 728588766.

It is a happy number.

It is not a de Polignac number, because 667885827 - 2⁶ = 667885763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667885327) 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, 323503 + ... + 325560.

It is an arithmetic number, because the mean of its divisors is an integer number (64906400).

Almost surely, 2^667885827 is an apocalyptic number.

667885827 is a deficient number, since it is larger than the sum of its proper divisors (370616573).

667885827 is an equidigital number, since it uses as much as digits as its factorization.

667885827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649087 (or 649073 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 57.

The square root of 667885827 is about 25843.4871292556. The cubic root of 667885827 is about 874.1126577790.

The spelling of 667885827 in words is "six hundred sixty-seven million, eight hundred eighty-five thousand, eight hundred twenty-seven".