667840713 has 8 divisors (see below), whose sum is σ = 914520768. Its totient is φ = 433193904.

The previous prime is 667840703. The next prime is 667840721. The reversal of 667840713 is 317048766.

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

It is not a de Polignac number, because 667840713 - 2¹³ = 667832521 is a prime.

It is a super-2 number, since 2×667840713² = 892022435880696738, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (667840703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3008181 + ... + 3008402.

It is an arithmetic number, because the mean of its divisors is an integer number (114315096).

Almost surely, 2^667840713 is an apocalyptic number.

It is an amenable number.

667840713 is a deficient number, since it is larger than the sum of its proper divisors (246680055).

667840713 is a wasteful number, since it uses less digits than its factorization.

667840713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6016623.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 667840713 is about 25842.6142833886. The cubic root of 667840713 is about 874.0929759687.

The spelling of 667840713 in words is "six hundred sixty-seven million, eight hundred forty thousand, seven hundred thirteen".