667799085 has 16 divisors (see below), whose sum is σ = 1068807744. Its totient is φ = 356049792.

The previous prime is 667799081. The next prime is 667799113. The reversal of 667799085 is 580997766.

It is not a de Polignac number, because 667799085 - 2² = 667799081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667799081) 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, 74874 + ... + 83316.

It is an arithmetic number, because the mean of its divisors is an integer number (66800484).

Almost surely, 2^667799085 is an apocalyptic number.

It is an amenable number.

667799085 is a deficient number, since it is larger than the sum of its proper divisors (401008659).

667799085 is a wasteful number, since it uses less digits than its factorization.

667799085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13724.

The product of its (nonzero) digits is 5715360, while the sum is 57.

The square root of 667799085 is about 25841.8088569667. The cubic root of 667799085 is about 874.0748142036.

The spelling of 667799085 in words is "six hundred sixty-seven million, seven hundred ninety-nine thousand, eighty-five".