667421314 has 48 divisors (see below), whose sum is σ = 1204354368. Its totient is φ = 271709856.

The previous prime is 667421273. The next prime is 667421317. The reversal of 667421314 is 413124766.

667421314 = T₁ + T₂ + ... + T₁₅₈₇.

667421314 is a nontrivial binomial coefficient, being equal to C(1589, 3).

It is a self number, because there is not a number n which added to its sum of digits gives 667421314.

It is not an unprimeable number, because it can be changed into a prime (667421317) by changing a digit.

It is the 1587-th tetrahedral number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1680964 + ... + 1681360.

It is an arithmetic number, because the mean of its divisors is an integer number (25090716).

Almost surely, 2^667421314 is an apocalyptic number.

667421314 is a deficient number, since it is larger than the sum of its proper divisors (536933054).

667421314 is a wasteful number, since it uses less digits than its factorization.

667421314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 656 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 667421314 is about 25834.4985242602. The cubic root of 667421314 is about 873.9099630241.

The spelling of 667421314 in words is "six hundred sixty-seven million, four hundred twenty-one thousand, three hundred fourteen".