66253652 has 12 divisors (see below), whose sum is σ = 116018196. Its totient is φ = 33105600.

The previous prime is 66253633. The next prime is 66253673. The reversal of 66253652 is 25635266.

It can be written as a sum of positive squares in 2 ways, for example, as 37136836 + 29116816 = 6094^2 + 5396^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3248 + ... + 11960.

It is an arithmetic number, because the mean of its divisors is an integer number (9668183).

Almost surely, 2^66253652 is an apocalyptic number.

It is an amenable number.

66253652 is a deficient number, since it is larger than the sum of its proper divisors (49764544).

66253652 is a wasteful number, since it uses less digits than its factorization.

66253652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10618 (or 10616 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 66253652 is about 8139.6346355349. The cubic root of 66253652 is about 404.6410516708.

The spelling of 66253652 in words is "sixty-six million, two hundred fifty-three thousand, six hundred fifty-two".