66446302131 has 64 divisors (see below), whose sum is σ = 112188948480. Its totient is φ = 38501460000.

The previous prime is 66446302129. The next prime is 66446302177. The reversal of 66446302131 is 13120364466.

66446302131 is a `hidden beast` number, since 6 + 6 + 4 + 4 + 630 + 2 + 13 + 1 = 666.

It is not a de Polignac number, because 66446302131 - 2¹ = 66446302129 is a prime.

It is a super-2 number, since 2×66446302131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66446302331) 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 63 ways as a sum of consecutive naturals, for example, 720706 + ... + 807656.

It is an arithmetic number, because the mean of its divisors is an integer number (1752952320).

Almost surely, 2^66446302131 is an apocalyptic number.

66446302131 is a deficient number, since it is larger than the sum of its proper divisors (45742646349).

66446302131 is a wasteful number, since it uses less digits than its factorization.

66446302131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87085 (or 87079 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 66446302131 its reverse (13120364466), we get a palindrome (79566666597).

The spelling of 66446302131 in words is "sixty-six billion, four hundred forty-six million, three hundred two thousand, one hundred thirty-one".