66146623 has 2 divisors, whose sum is σ = 66146624. Its totient is φ = 66146622.

The previous prime is 66146579. The next prime is 66146627. The reversal of 66146623 is 32664166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66146623 - 2⁹ = 66146111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66146627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33073311 + 33073312.

It is an arithmetic number, because the mean of its divisors is an integer number (33073312).

Almost surely, 2^66146623 is an apocalyptic number.

66146623 is a deficient number, since it is larger than the sum of its proper divisors (1).

66146623 is an equidigital number, since it uses as much as digits as its factorization.

66146623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 66146623 is about 8133.0574201834. The cubic root of 66146623 is about 404.4230427134.

It can be divided in two parts, 66 and 146623, that added together give a square (146689 = 383²).

The spelling of 66146623 in words is "sixty-six million, one hundred forty-six thousand, six hundred twenty-three".