666554467 has 16 divisors (see below), whose sum is σ = 724764672. Its totient is φ = 611170560.

The previous prime is 666554453. The next prime is 666554489. The reversal of 666554467 is 764455666.

It is a cyclic number.

It is not a de Polignac number, because 666554467 - 2¹⁵ = 666521699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666554467.

It is not an unprimeable number, because it can be changed into a prime (666554407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71923 + ... + 80659.

It is an arithmetic number, because the mean of its divisors is an integer number (45297792).

Almost surely, 2^666554467 is an apocalyptic number.

666554467 is a deficient number, since it is larger than the sum of its proper divisors (58210205).

666554467 is a wasteful number, since it uses less digits than its factorization.

666554467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8898.

The product of its digits is 3628800, while the sum is 49.

The square root of 666554467 is about 25817.7161460885. The cubic root of 666554467 is about 873.5314542682.

The spelling of 666554467 in words is "six hundred sixty-six million, five hundred fifty-four thousand, four hundred sixty-seven".