667770343 has 2 divisors, whose sum is σ = 667770344. Its totient is φ = 667770342.

The previous prime is 667770329. The next prime is 667770377. The reversal of 667770343 is 343077766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667770343 - 2²¹ = 665673191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667770343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667771343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333885171 + 333885172.

It is an arithmetic number, because the mean of its divisors is an integer number (333885172).

Almost surely, 2^667770343 is an apocalyptic number.

667770343 is a deficient number, since it is larger than the sum of its proper divisors (1).

667770343 is an equidigital number, since it uses as much as digits as its factorization.

667770343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 43.

The square root of 667770343 is about 25841.2527366612. The cubic root of 667770343 is about 874.0622739954.

The spelling of 667770343 in words is "six hundred sixty-seven million, seven hundred seventy thousand, three hundred forty-three".