66274064 has 10 divisors (see below), whose sum is σ = 128406030. Its totient is φ = 33137024.

The previous prime is 66274031. The next prime is 66274069. The reversal of 66274064 is 46047266.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64000000 + 2274064 = 8000^2 + 1508^2 .

It is not an unprimeable number, because it can be changed into a prime (66274069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2071049 + ... + 2071080.

It is an arithmetic number, because the mean of its divisors is an integer number (12840603).

Almost surely, 2^66274064 is an apocalyptic number.

It is an amenable number.

66274064 is a deficient number, since it is larger than the sum of its proper divisors (62131966).

66274064 is a wasteful number, since it uses less digits than its factorization.

66274064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142137 (or 4142131 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 66274064 is about 8140.8884036080. Note that the first 3 decimals coincide. The cubic root of 66274064 is about 404.6826025127.

The spelling of 66274064 in words is "sixty-six million, two hundred seventy-four thousand, sixty-four".