66308610291 has 16 divisors (see below), whose sum is σ = 110227300608. Its totient is φ = 34446031200.

The previous prime is 66308610281. The next prime is 66308610301. The reversal of 66308610291 is 19201680366.

It is an interprime number because it is at equal distance from previous prime (66308610281) and next prime (66308610301).

It is not a de Polignac number, because 66308610291 - 2¹¹ = 66308608243 is a prime.

It is a super-2 number, since 2×66308610291² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66308610241) 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 15 ways as a sum of consecutive naturals, for example, 143524900 + ... + 143525361.

It is an arithmetic number, because the mean of its divisors is an integer number (6889206288).

Almost surely, 2^66308610291 is an apocalyptic number.

66308610291 is a deficient number, since it is larger than the sum of its proper divisors (43918690317).

66308610291 is a wasteful number, since it uses less digits than its factorization.

66308610291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287050282.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 66308610291 in words is "sixty-six billion, three hundred eight million, six hundred ten thousand, two hundred ninety-one".