66250641626 has 8 divisors (see below), whose sum is σ = 107020267284. Its totient is φ = 30577219200.

The previous prime is 66250641623. The next prime is 66250641637. The reversal of 66250641626 is 62614605266.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64414947601 + 1835694025 = 253801^2 + 42845^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66250641623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274050775 + ... + 1274050826.

Almost surely, 2^66250641626 is an apocalyptic number.

66250641626 is a deficient number, since it is larger than the sum of its proper divisors (40769625658).

66250641626 is a wasteful number, since it uses less digits than its factorization.

66250641626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548101616.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 66250641626 in words is "sixty-six billion, two hundred fifty million, six hundred forty-one thousand, six hundred twenty-six".