667276663 has 4 divisors (see below), whose sum is σ = 667468648. Its totient is φ = 667084680.

The previous prime is 667276661. The next prime is 667276679. The reversal of 667276663 is 366672766.

It is a happy number.

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 667276663 - 2¹ = 667276661 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 (667276661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90681 + ... + 97762.

It is an arithmetic number, because the mean of its divisors is an integer number (166867162).

Almost surely, 2^667276663 is an apocalyptic number.

667276663 is a deficient number, since it is larger than the sum of its proper divisors (191985).

667276663 is a wasteful number, since it uses less digits than its factorization.

667276663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191984.

The product of its digits is 2286144, while the sum is 49.

The square root of 667276663 is about 25831.6988020533. The cubic root of 667276663 is about 873.8468239539.

The spelling of 667276663 in words is "six hundred sixty-seven million, two hundred seventy-six thousand, six hundred sixty-three".