66682253 has 6 divisors (see below), whose sum is σ = 73295502. Its totient is φ = 60620120.

The previous prime is 66682247. The next prime is 66682289. The reversal of 66682253 is 35228666.

It can be written as a sum of positive squares in only one way, i.e., 66618244 + 64009 = 8162^2 + 253^2 .

It is not a de Polignac number, because 66682253 - 2⁸ = 66681997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66681253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275426 + ... + 275667.

It is an arithmetic number, because the mean of its divisors is an integer number (12215917).

Almost surely, 2^66682253 is an apocalyptic number.

It is an amenable number.

66682253 is a deficient number, since it is larger than the sum of its proper divisors (6613249).

66682253 is a wasteful number, since it uses less digits than its factorization.

66682253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551115 (or 551104 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 66682253 is about 8165.9202175872. The cubic root of 66682253 is about 405.5117303185.

The spelling of 66682253 in words is "sixty-six million, six hundred eighty-two thousand, two hundred fifty-three".