66253018 has 24 divisors (see below), whose sum is σ = 111902868. Its totient is φ = 29242752.

The previous prime is 66253013. The next prime is 66253027. The reversal of 66253018 is 81035266.

It can be written as a sum of positive squares in 2 ways, for example, as 54508689 + 11744329 = 7383^2 + 3427^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66253013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11346 + ... + 16162.

Almost surely, 2^66253018 is an apocalyptic number.

66253018 is a deficient number, since it is larger than the sum of its proper divisors (45649850).

66253018 is a wasteful number, since it uses less digits than its factorization.

66253018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4878 (or 4855 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 66253018 is about 8139.5956902048. The cubic root of 66253018 is about 404.6397609583.

The spelling of 66253018 in words is "sixty-six million, two hundred fifty-three thousand, eighteen".