667576423 has 2 divisors, whose sum is σ = 667576424. Its totient is φ = 667576422.

The previous prime is 667576373. The next prime is 667576523. The reversal of 667576423 is 324675766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667576423 - 2²¹ = 665479271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667576223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333788211 + 333788212.

It is an arithmetic number, because the mean of its divisors is an integer number (333788212).

Almost surely, 2^667576423 is an apocalyptic number.

667576423 is a deficient number, since it is larger than the sum of its proper divisors (1).

667576423 is an equidigital number, since it uses as much as digits as its factorization.

667576423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 46.

The square root of 667576423 is about 25837.5003241413. The cubic root of 667576423 is about 873.9776567973.

The spelling of 667576423 in words is "six hundred sixty-seven million, five hundred seventy-six thousand, four hundred twenty-three".