667256040802 has 16 divisors (see below), whose sum is σ = 1078746557112. Its totient is φ = 307715351040.

The previous prime is 667256040733. The next prime is 667256040823. The reversal of 667256040802 is 208040652766.

It can be written as a sum of positive squares in 4 ways, for example, as 634426587081 + 32829453721 = 796509^2 + 181189^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10341199 + ... + 10405522.

Almost surely, 2^667256040802 is an apocalyptic number.

667256040802 is a deficient number, since it is larger than the sum of its proper divisors (411490516310).

667256040802 is a wasteful number, since it uses less digits than its factorization.

667256040802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20747973.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 667256040802 in words is "six hundred sixty-seven billion, two hundred fifty-six million, forty thousand, eight hundred two".