667047031 has 8 divisors (see below), whose sum is σ = 762503040. Its totient is φ = 571631928.

The previous prime is 667046993. The next prime is 667047061. The reversal of 667047031 is 130740766.

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

It is not a de Polignac number, because 667047031 - 2⁹ = 667046519 is a prime.

It is a super-2 number, since 2×667047031² = 889903483131829922, which 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 (667047061) 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, 43680 + ... + 56938.

It is an arithmetic number, because the mean of its divisors is an integer number (95312880).

Almost surely, 2^667047031 is an apocalyptic number.

667047031 is a deficient number, since it is larger than the sum of its proper divisors (95456009).

667047031 is a wasteful number, since it uses less digits than its factorization.

667047031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20453.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 667047031 is about 25827.2536480362. The cubic root of 667047031 is about 873.7465725751.

Adding to 667047031 its reverse (130740766), we get a palindrome (797787797).

The spelling of 667047031 in words is "six hundred sixty-seven million, forty-seven thousand, thirty-one".