66354875 has 16 divisors (see below), whose sum is σ = 85054944. Its totient is φ = 51645600.

The previous prime is 66354863. The next prime is 66354877. The reversal of 66354875 is 57845366.

It is not a de Polignac number, because 66354875 - 2⁸ = 66354619 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66354877) 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 in 15 ways as a sum of consecutive naturals, for example, 2549 + ... + 11798.

It is an arithmetic number, because the mean of its divisors is an integer number (5315934).

Almost surely, 2^66354875 is an apocalyptic number.

66354875 is a deficient number, since it is larger than the sum of its proper divisors (18700069).

66354875 is a wasteful number, since it uses less digits than its factorization.

66354875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14399 (or 14389 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The square root of 66354875 is about 8145.8501704856. The cubic root of 66354875 is about 404.8470183783.

The spelling of 66354875 in words is "sixty-six million, three hundred fifty-four thousand, eight hundred seventy-five".