667387031 has 8 divisors (see below), whose sum is σ = 679886544. Its totient is φ = 654937920.

The previous prime is 667387013. The next prime is 667387033. The reversal of 667387031 is 130783766.

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

It is a cyclic number.

It is not a de Polignac number, because 667387031 - 2¹⁰ = 667386007 is a prime.

It is a super-2 number, since 2×667387031² = 890810898293989922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667387031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667387033) 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, 14675 + ... + 39371.

It is an arithmetic number, because the mean of its divisors is an integer number (84985818).

Almost surely, 2^667387031 is an apocalyptic number.

667387031 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

667387031 is a deficient number, since it is larger than the sum of its proper divisors (12499513).

667387031 is a wasteful number, since it uses less digits than its factorization.

667387031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25201.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 667387031 is about 25833.8350037311. The cubic root of 667387031 is about 873.8949995782.

The spelling of 667387031 in words is "six hundred sixty-seven million, three hundred eighty-seven thousand, thirty-one".