667370663 has 4 divisors (see below), whose sum is σ = 673607880. Its totient is φ = 661133448.

The previous prime is 667370657. The next prime is 667370729. The reversal of 667370663 is 366073766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366073766 = 2 ⋅183036883.

It is a cyclic number.

It is not a de Polignac number, because 667370663 - 2¹⁶ = 667305127 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 (667375663) 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, 3118448 + ... + 3118661.

It is an arithmetic number, because the mean of its divisors is an integer number (168401970).

Almost surely, 2^667370663 is an apocalyptic number.

667370663 is a deficient number, since it is larger than the sum of its proper divisors (6237217).

667370663 is a wasteful number, since it uses less digits than its factorization.

667370663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6237216.

The product of its (nonzero) digits is 571536, while the sum is 44.

The square root of 667370663 is about 25833.5182079406. The cubic root of 667370663 is about 873.8878552828.

The spelling of 667370663 in words is "six hundred sixty-seven million, three hundred seventy thousand, six hundred sixty-three".