66545274 has 32 divisors (see below), whose sum is σ = 136002240. Its totient is φ = 21700352.

The previous prime is 66545273. The next prime is 66545287. The reversal of 66545274 is 47254566.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66545273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111922 + ... + 112514.

It is an arithmetic number, because the mean of its divisors is an integer number (4250070).

Almost surely, 2^66545274 is an apocalyptic number.

66545274 is an abundant number, since it is smaller than the sum of its proper divisors (69456966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66545274 is a wasteful number, since it uses less digits than its factorization.

66545274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974.

The product of its digits is 201600, while the sum is 39.

The square root of 66545274 is about 8157.5286698853. The cubic root of 66545274 is about 405.2338719331.

The spelling of 66545274 in words is "sixty-six million, five hundred forty-five thousand, two hundred seventy-four".