667767853 has 2 divisors, whose sum is σ = 667767854. Its totient is φ = 667767852.

The previous prime is 667767827. The next prime is 667767857. The reversal of 667767853 is 358767766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365077449 + 302690404 = 19107^2 + 17398^2 .

It is a cyclic number.

It is not a de Polignac number, because 667767853 - 2⁹ = 667767341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667767794 and 667767803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667767857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333883926 + 333883927.

It is an arithmetic number, because the mean of its divisors is an integer number (333883927).

Almost surely, 2^667767853 is an apocalyptic number.

It is an amenable number.

667767853 is a deficient number, since it is larger than the sum of its proper divisors (1).

667767853 is an equidigital number, since it uses as much as digits as its factorization.

667767853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8890560, while the sum is 55.

The square root of 667767853 is about 25841.2045578375. The cubic root of 667767853 is about 874.0611875851.

The spelling of 667767853 in words is "six hundred sixty-seven million, seven hundred sixty-seven thousand, eight hundred fifty-three".