345660671 has 2 divisors, whose sum is σ = 345660672. Its totient is φ = 345660670.

The previous prime is 345660649. The next prime is 345660719. The reversal of 345660671 is 176066543.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345660671 - 2¹⁸ = 345398527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345660641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172830335 + 172830336.

It is an arithmetic number, because the mean of its divisors is an integer number (172830336).

Almost surely, 2^345660671 is an apocalyptic number.

345660671 is a deficient number, since it is larger than the sum of its proper divisors (1).

345660671 is an equidigital number, since it uses as much as digits as its factorization.

345660671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 345660671 is about 18591.9517802731. The cubic root of 345660671 is about 701.8053202961.

The spelling of 345660671 in words is "three hundred forty-five million, six hundred sixty thousand, six hundred seventy-one".