66968023 has 2 divisors, whose sum is σ = 66968024. Its totient is φ = 66968022.

The previous prime is 66968021. The next prime is 66968051. The reversal of 66968023 is 32086966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66968023 - 2¹ = 66968021 is a prime.

It is a super-2 number, since 2×66968023² = 8969432209057058, which contains 22 as substring.

Together with 66968021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66968021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33484011 + 33484012.

It is an arithmetic number, because the mean of its divisors is an integer number (33484012).

Almost surely, 2^66968023 is an apocalyptic number.

66968023 is a deficient number, since it is larger than the sum of its proper divisors (1).

66968023 is an equidigital number, since it uses as much as digits as its factorization.

66968023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 66968023 is about 8183.3992325928. The cubic root of 66968023 is about 406.0901847754.

The spelling of 66968023 in words is "sixty-six million, nine hundred sixty-eight thousand, twenty-three".