667687257319 has 4 divisors (see below), whose sum is σ = 696717138096. Its totient is φ = 638657376544.

The previous prime is 667687257317. The next prime is 667687257353. The reversal of 667687257319 is 913752786766.

667687257319 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 667687257319 - 2¹ = 667687257317 is a prime.

It is a super-2 number, since 2×667687257319² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667687257311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14514940354 + ... + 14514940399.

It is an arithmetic number, because the mean of its divisors is an integer number (174179284524).

Almost surely, 2^667687257319 is an apocalyptic number.

667687257319 is a deficient number, since it is larger than the sum of its proper divisors (29029880777).

667687257319 is a wasteful number, since it uses less digits than its factorization.

667687257319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29029880776.

The product of its digits is 160030080, while the sum is 67.

The spelling of 667687257319 in words is "six hundred sixty-seven billion, six hundred eighty-seven million, two hundred fifty-seven thousand, three hundred nineteen".