66546275 has 12 divisors (see below), whose sum is σ = 82753632. Its totient is φ = 53084640.

The previous prime is 66546269. The next prime is 66546281. The reversal of 66546275 is 57264566.

It is an interprime number because it is at equal distance from previous prime (66546269) and next prime (66546281).

It is not a de Polignac number, because 66546275 - 2²⁴ = 49769059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5549 + ... + 12801.

It is an arithmetic number, because the mean of its divisors is an integer number (6896136).

Almost surely, 2^66546275 is an apocalyptic number.

66546275 is a deficient number, since it is larger than the sum of its proper divisors (16207357).

66546275 is a wasteful number, since it uses less digits than its factorization.

66546275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7630 (or 7625 counting only the distinct ones).

The product of its digits is 302400, while the sum is 41.

The square root of 66546275 is about 8157.5900240206. The cubic root of 66546275 is about 405.2359038183.

The spelling of 66546275 in words is "sixty-six million, five hundred forty-six thousand, two hundred seventy-five".