66571045 has 8 divisors (see below), whose sum is σ = 79975800. Its totient is φ = 53196480.

The previous prime is 66571033. The next prime is 66571049. The reversal of 66571045 is 54017566.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24295041 + 42276004 = 4929^2 + 6502^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-66571045 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66571045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66571049) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2370 + ... + 11779.

It is an arithmetic number, because the mean of its divisors is an integer number (9996975).

Almost surely, 2^66571045 is an apocalyptic number.

It is an amenable number.

66571045 is a deficient number, since it is larger than the sum of its proper divisors (13404755).

66571045 is a wasteful number, since it uses less digits than its factorization.

66571045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15095.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 66571045 is about 8159.1081007669. The cubic root of 66571045 is about 405.2861768460.

The spelling of 66571045 in words is "sixty-six million, five hundred seventy-one thousand, forty-five".