66135546 has 12 divisors (see below), whose sum is σ = 143293722. Its totient is φ = 22045176.

The previous prime is 66135527. The next prime is 66135551. The reversal of 66135546 is 64553166.

It can be written as a sum of positive squares in only one way, i.e., 57927321 + 8208225 = 7611^2 + 2865^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66135546.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1837081 + ... + 1837116.

Almost surely, 2^66135546 is an apocalyptic number.

66135546 is an abundant number, since it is smaller than the sum of its proper divisors (77158176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66135546 is a wasteful number, since it uses less digits than its factorization.

66135546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674205 (or 3674202 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 66135546 is about 8132.3764054549. The cubic root of 66135546 is about 404.4004663826.

The spelling of 66135546 in words is "sixty-six million, one hundred thirty-five thousand, five hundred forty-six".