667406774 has 24 divisors (see below), whose sum is σ = 1089439848. Its totient is φ = 306402560.

The previous prime is 667406771. The next prime is 667406809. The reversal of 667406774 is 477604766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667406771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9617 + ... + 37779.

It is an arithmetic number, because the mean of its divisors is an integer number (45393327).

Almost surely, 2^667406774 is an apocalyptic number.

667406774 is a deficient number, since it is larger than the sum of its proper divisors (422033074).

667406774 is a wasteful number, since it uses less digits than its factorization.

667406774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28240 (or 28223 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 47.

The square root of 667406774 is about 25834.2171160653. The cubic root of 667406774 is about 873.9036168363.

The spelling of 667406774 in words is "six hundred sixty-seven million, four hundred six thousand, seven hundred seventy-four".