66566152 has 16 divisors (see below), whose sum is σ = 132153660. Its totient is φ = 31325184.

The previous prime is 66566141. The next prime is 66566221. The reversal of 66566152 is 25166566.

It can be written as a sum of positive squares in 2 ways, for example, as 54552996 + 12013156 = 7386^2 + 3466^2 .

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, 244593 + ... + 244864.

Almost surely, 2^66566152 is an apocalyptic number.

It is an amenable number.

66566152 is a deficient number, since it is larger than the sum of its proper divisors (65587508).

66566152 is a wasteful number, since it uses less digits than its factorization.

66566152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489480 (or 489476 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 66566152 is about 8158.8082463066. The cubic root of 66566152 is about 405.2762470341.

The spelling of 66566152 in words is "sixty-six million, five hundred sixty-six thousand, one hundred fifty-two".