66570752 has 20 divisors (see below), whose sum is σ = 133012506. Its totient is φ = 33285120.

The previous prime is 66570743. The next prime is 66570767. The reversal of 66570752 is 25707566.

66570752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 66324736 + 246016 = 8144^2 + 496^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64499 + ... + 65522.

Almost surely, 2^66570752 is an apocalyptic number.

It is an amenable number.

66570752 is a deficient number, since it is larger than the sum of its proper divisors (66441754).

66570752 is an equidigital number, since it uses as much as digits as its factorization.

66570752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130039 (or 130023 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 66570752 is about 8159.0901453532. The cubic root of 66570752 is about 405.2855822480.

It can be divided in two parts, 665 and 70752, that added together give a palindrome (71417).

The spelling of 66570752 in words is "sixty-six million, five hundred seventy thousand, seven hundred fifty-two".