146666623 has 2 divisors, whose sum is σ = 146666624. Its totient is φ = 146666622.

The previous prime is 146666621. The next prime is 146666629. The reversal of 146666623 is 326666641.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 146666623 - 2¹ = 146666621 is a prime.

It is a super-2 number, since 2×146666623² = 43022196604448258, which contains 22 as substring.

Together with 146666621, 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 (146666621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73333311 + 73333312.

It is an arithmetic number, because the mean of its divisors is an integer number (73333312).

Almost surely, 2^146666623 is an apocalyptic number.

146666623 is a deficient number, since it is larger than the sum of its proper divisors (1).

146666623 is an equidigital number, since it uses as much as digits as its factorization.

146666623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 40.

The square root of 146666623 is about 12110.5996135617. The cubic root of 146666623 is about 527.3639405608.

The spelling of 146666623 in words is "one hundred forty-six million, six hundred sixty-six thousand, six hundred twenty-three".