66622545 has 24 divisors (see below), whose sum is σ = 125978112. Its totient is φ = 32301600.

The previous prime is 66622511. The next prime is 66622573. The reversal of 66622545 is 54522666.

66622545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66622545 - 2⁶ = 66622481 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66801 + ... + 67790.

It is an arithmetic number, because the mean of its divisors is an integer number (5249088).

Almost surely, 2^66622545 is an apocalyptic number.

It is an amenable number.

66622545 is a deficient number, since it is larger than the sum of its proper divisors (59355567).

66622545 is a wasteful number, since it uses less digits than its factorization.

66622545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134613 (or 134610 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 66622545 is about 8162.2634728364. The cubic root of 66622545 is about 405.3906610007.

The spelling of 66622545 in words is "sixty-six million, six hundred twenty-two thousand, five hundred forty-five".