667403867 has 32 divisors (see below), whose sum is σ = 798948864. Its totient is φ = 551577600.

The previous prime is 667403809. The next prime is 667403873. The reversal of 667403867 is 768304766.

It is a cyclic number.

It is not a de Polignac number, because 667403867 - 2¹⁰ = 667402843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667403567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 417113 + ... + 418709.

It is an arithmetic number, because the mean of its divisors is an integer number (24967152).

Almost surely, 2^667403867 is an apocalyptic number.

667403867 is a deficient number, since it is larger than the sum of its proper divisors (131544997).

667403867 is a wasteful number, since it uses less digits than its factorization.

667403867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719.

The product of its (nonzero) digits is 1016064, while the sum is 47.

The square root of 667403867 is about 25834.1608534127. The cubic root of 667403867 is about 873.9023480241.

It can be divided in two parts, 66740 and 3867, that added together give a palindrome (70607).

The spelling of 667403867 in words is "six hundred sixty-seven million, four hundred three thousand, eight hundred sixty-seven".