667387774 has 8 divisors (see below), whose sum is σ = 1001514528. Its totient is φ = 333549600.

The previous prime is 667387729. The next prime is 667387781. The reversal of 667387774 is 477783766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66267 + ... + 75670.

It is an arithmetic number, because the mean of its divisors is an integer number (125189316).

Almost surely, 2^667387774 is an apocalyptic number.

667387774 is a deficient number, since it is larger than the sum of its proper divisors (334126754).

667387774 is a wasteful number, since it uses less digits than its factorization.

667387774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144290.

The product of its digits is 8297856, while the sum is 55.

The square root of 667387774 is about 25833.8493840930. The cubic root of 667387774 is about 873.8953238796.

The spelling of 667387774 in words is "six hundred sixty-seven million, three hundred eighty-seven thousand, seven hundred seventy-four".