66628724122147 has 16 divisors (see below), whose sum is σ = 76300305080832. Its totient is φ = 57591086681920.

The previous prime is 66628724122141. The next prime is 66628724122171. The reversal of 66628724122147 is 74122142782666.

It is a happy number.

It is not a de Polignac number, because 66628724122147 - 2⁷ = 66628724122019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66628724122091 and 66628724122100.

It is not an unprimeable number, because it can be changed into a prime (66628724122141) 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, 788444698 + ... + 788529199.

It is an arithmetic number, because the mean of its divisors is an integer number (4768769067552).

Almost surely, 2^{66628724122147} is an apocalyptic number.

66628724122147 is a deficient number, since it is larger than the sum of its proper divisors (9671580958685).

66628724122147 is a wasteful number, since it uses less digits than its factorization.

66628724122147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576974098.

The product of its digits is 21676032, while the sum is 58.

The spelling of 66628724122147 in words is "sixty-six trillion, six hundred twenty-eight billion, seven hundred twenty-four million, one hundred twenty-two thousand, one hundred forty-seven".