66061652 has 12 divisors (see below), whose sum is σ = 119594580. Its totient is φ = 31891776.

The previous prime is 66061637. The next prime is 66061661. The reversal of 66061652 is 25616066.

It can be written as a sum of positive squares in 2 ways, for example, as 14853316 + 51208336 = 3854^2 + 7156^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284633 + ... + 284864.

It is an arithmetic number, because the mean of its divisors is an integer number (9966215).

Almost surely, 2^66061652 is an apocalyptic number.

It is an amenable number.

66061652 is a deficient number, since it is larger than the sum of its proper divisors (53532928).

66061652 is a wasteful number, since it uses less digits than its factorization.

66061652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569530 (or 569528 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66061652 is about 8127.8319372389. The cubic root of 66061652 is about 404.2497965021.

The spelling of 66061652 in words is "sixty-six million, sixty-one thousand, six hundred fifty-two".