212665641967 has 2 divisors, whose sum is σ = 212665641968. Its totient is φ = 212665641966.

The previous prime is 212665641959. The next prime is 212665642037. The reversal of 212665641967 is 769146566212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212665641967 - 2³ = 212665641959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212665641917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106332820983 + 106332820984.

It is an arithmetic number, because the mean of its divisors is an integer number (106332820984).

Almost surely, 2^212665641967 is an apocalyptic number.

212665641967 is a deficient number, since it is larger than the sum of its proper divisors (1).

212665641967 is an equidigital number, since it uses as much as digits as its factorization.

212665641967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 55.

The spelling of 212665641967 in words is "two hundred twelve billion, six hundred sixty-five million, six hundred forty-one thousand, nine hundred sixty-seven".