66250730751 has 8 divisors (see below), whose sum is σ = 88427589504. Its totient is φ = 44120512920.

The previous prime is 66250730747. The next prime is 66250730771. The reversal of 66250730751 is 15703705266.

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

It is not a de Polignac number, because 66250730751 - 2² = 66250730747 is a prime.

It is a super-3 number, since 3×66250730751³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66250730771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11656915 + ... + 11662596.

It is an arithmetic number, because the mean of its divisors is an integer number (11053448688).

Almost surely, 2^66250730751 is an apocalyptic number.

66250730751 is a deficient number, since it is larger than the sum of its proper divisors (22176858753).

66250730751 is a wasteful number, since it uses less digits than its factorization.

66250730751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23320461.

The product of its (nonzero) digits is 264600, while the sum is 42.

The spelling of 66250730751 in words is "sixty-six billion, two hundred fifty million, seven hundred thirty thousand, seven hundred fifty-one".