667348663 has 4 divisors (see below), whose sum is σ = 669030040. Its totient is φ = 665667288.

The previous prime is 667348637. The next prime is 667348681. The reversal of 667348663 is 366843766.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667348663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667348063) 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, 840093 + ... + 840886.

It is an arithmetic number, because the mean of its divisors is an integer number (167257510).

Almost surely, 2^667348663 is an apocalyptic number.

667348663 is a deficient number, since it is larger than the sum of its proper divisors (1681377).

667348663 is a wasteful number, since it uses less digits than its factorization.

667348663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681376.

The product of its digits is 2612736, while the sum is 49.

The square root of 667348663 is about 25833.0924010270. The cubic root of 667348663 is about 873.8782525512.

The spelling of 667348663 in words is "six hundred sixty-seven million, three hundred forty-eight thousand, six hundred sixty-three".