667603623 has 4 divisors (see below), whose sum is σ = 890138168. Its totient is φ = 445069080.

The previous prime is 667603613. The next prime is 667603639. The reversal of 667603623 is 326306766.

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

It is not a de Polignac number, because 667603623 - 2¹⁰ = 667602599 is a prime.

It is a super-2 number, since 2×667603623² = 891389194885452258, 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 (667603613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111267268 + ... + 111267273.

It is an arithmetic number, because the mean of its divisors is an integer number (222534542).

Almost surely, 2^667603623 is an apocalyptic number.

667603623 is a deficient number, since it is larger than the sum of its proper divisors (222534545).

667603623 is a wasteful number, since it uses less digits than its factorization.

667603623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222534544.

The product of its (nonzero) digits is 163296, while the sum is 39.

The square root of 667603623 is about 25838.0266854882. The cubic root of 667603623 is about 873.9895265341.

The spelling of 667603623 in words is "six hundred sixty-seven million, six hundred three thousand, six hundred twenty-three".