66555752 has 16 divisors (see below), whose sum is σ = 125103300. Its totient is φ = 33194880.

The previous prime is 66555743. The next prime is 66555763. The reversal of 66555752 is 25755566.

It can be written as a sum of positive squares in 2 ways, for example, as 60435076 + 6120676 = 7774^2 + 2474^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6899 + ... + 13442.

Almost surely, 2^66555752 is an apocalyptic number.

It is an amenable number.

66555752 is a deficient number, since it is larger than the sum of its proper divisors (58547548).

66555752 is a wasteful number, since it uses less digits than its factorization.

66555752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20756 (or 20752 counting only the distinct ones).

The product of its digits is 315000, while the sum is 41.

The square root of 66555752 is about 8158.1708734250. The cubic root of 66555752 is about 405.2551397478.

The spelling of 66555752 in words is "sixty-six million, five hundred fifty-five thousand, seven hundred fifty-two".