66250645 has 8 divisors (see below), whose sum is σ = 82242360. Its totient is φ = 51172800.

The previous prime is 66250619. The next prime is 66250661. The reversal of 66250645 is 54605266.

It can be written as a sum of positive squares in 4 ways, for example, as 7360369 + 58890276 = 2713^2 + 7674^2 .

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

It is not a de Polignac number, because 66250645 - 2¹¹ = 66248597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66250645.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 228306 + ... + 228595.

It is an arithmetic number, because the mean of its divisors is an integer number (10280295).

Almost surely, 2^66250645 is an apocalyptic number.

It is an amenable number.

66250645 is a deficient number, since it is larger than the sum of its proper divisors (15991715).

66250645 is a wasteful number, since it uses less digits than its factorization.

66250645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456935.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 66250645 is about 8139.4499199885. The cubic root of 66250645 is about 404.6349298747.

The spelling of 66250645 in words is "sixty-six million, two hundred fifty thousand, six hundred forty-five".