667797587 has 16 divisors (see below), whose sum is σ = 736452000. Its totient is φ = 602703360.

The previous prime is 667797583. The next prime is 667797601. The reversal of 667797587 is 785797766.

It is a cyclic number.

It is not a de Polignac number, because 667797587 - 2² = 667797583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667797583) 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, 68912 + ... + 78002.

It is an arithmetic number, because the mean of its divisors is an integer number (46028250).

Almost surely, 2^667797587 is an apocalyptic number.

667797587 is a deficient number, since it is larger than the sum of its proper divisors (68654413).

667797587 is a wasteful number, since it uses less digits than its factorization.

667797587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9286.

The product of its digits is 31116960, while the sum is 62.

The square root of 667797587 is about 25841.7798729112. The cubic root of 667797587 is about 874.0741606313.

The spelling of 667797587 in words is "six hundred sixty-seven million, seven hundred ninety-seven thousand, five hundred eighty-seven".