66268751 has 16 divisors (see below), whose sum is σ = 72276960. Its totient is φ = 60549120.

The previous prime is 66268747. The next prime is 66268757. The reversal of 66268751 is 15786266.

It is a cyclic number.

It is not a de Polignac number, because 66268751 - 2² = 66268747 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66268699 and 66268708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66268757) 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 15 ways as a sum of consecutive naturals, for example, 75125 + ... + 76001.

It is an arithmetic number, because the mean of its divisors is an integer number (4517310).

Almost surely, 2^66268751 is an apocalyptic number.

66268751 is a deficient number, since it is larger than the sum of its proper divisors (6008209).

66268751 is a wasteful number, since it uses less digits than its factorization.

66268751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034.

The product of its digits is 120960, while the sum is 41.

The square root of 66268751 is about 8140.5620813307. The cubic root of 66268751 is about 404.6717881459.

The spelling of 66268751 in words is "sixty-six million, two hundred sixty-eight thousand, seven hundred fifty-one".