667040859 has 16 divisors (see below), whose sum is σ = 990361600. Its totient is φ = 443725128.

The previous prime is 667040837. The next prime is 667040867. The reversal of 667040859 is 958040766.

It is not a de Polignac number, because 667040859 - 2²³ = 658652251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667040659) 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, 14179 + ... + 39180.

It is an arithmetic number, because the mean of its divisors is an integer number (61897600).

Almost surely, 2^667040859 is an apocalyptic number.

667040859 is a deficient number, since it is larger than the sum of its proper divisors (323320741).

667040859 is a wasteful number, since it uses less digits than its factorization.

667040859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53831 (or 53825 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 667040859 is about 25827.1341615751. The cubic root of 667040859 is about 873.7438777224.

The spelling of 667040859 in words is "six hundred sixty-seven million, forty thousand, eight hundred fifty-nine".