66751330 has 32 divisors (see below), whose sum is σ = 127675440. Its totient is φ = 25079040.

The previous prime is 66751303. The next prime is 66751331. The reversal of 66751330 is 3315766.

It can be written as a sum of positive squares in 8 ways, for example, as 25110121 + 41641209 = 5011^2 + 6453^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66751292 and 66751301.

It is not an unprimeable number, because it can be changed into a prime (66751331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7620 + ... + 13840.

Almost surely, 2^66751330 is an apocalyptic number.

66751330 is a deficient number, since it is larger than the sum of its proper divisors (60924110).

66751330 is a wasteful number, since it uses less digits than its factorization.

66751330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6294.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 66751330 is about 8170.1487134568. The cubic root of 66751330 is about 405.6517069269.

It can be divided in two parts, 66751 and 330, that added together give a square (67081 = 259²).

The spelling of 66751330 in words is "sixty-six million, seven hundred fifty-one thousand, three hundred thirty".