667413623 has 2 divisors, whose sum is σ = 667413624. Its totient is φ = 667413622.

The previous prime is 667413619. The next prime is 667413647. The reversal of 667413623 is 326314766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667413623 - 2² = 667413619 is a prime.

It is a super-2 number, since 2×667413623² = 890881888331972258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667413653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333706811 + 333706812.

It is an arithmetic number, because the mean of its divisors is an integer number (333706812).

Almost surely, 2^667413623 is an apocalyptic number.

667413623 is a deficient number, since it is larger than the sum of its proper divisors (1).

667413623 is an equidigital number, since it uses as much as digits as its factorization.

667413623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 38.

The square root of 667413623 is about 25834.3496724806. The cubic root of 667413623 is about 873.9066061903.

The spelling of 667413623 in words is "six hundred sixty-seven million, four hundred thirteen thousand, six hundred twenty-three".