667674347477 has 2 divisors, whose sum is σ = 667674347478. Its totient is φ = 667674347476.

The previous prime is 667674347443. The next prime is 667674347497. The reversal of 667674347477 is 774743476766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503001519076 + 164672828401 = 709226^2 + 405799^2 .

It is a cyclic number.

It is not a de Polignac number, because 667674347477 - 2²² = 667670153173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667674347407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333837173738 + 333837173739.

It is an arithmetic number, because the mean of its divisors is an integer number (333837173739).

Almost surely, 2^667674347477 is an apocalyptic number.

It is an amenable number.

667674347477 is a deficient number, since it is larger than the sum of its proper divisors (1).

667674347477 is an equidigital number, since it uses as much as digits as its factorization.

667674347477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 697019904, while the sum is 68.

The spelling of 667674347477 in words is "six hundred sixty-seven billion, six hundred seventy-four million, three hundred forty-seven thousand, four hundred seventy-seven".