66316880619 has 24 divisors (see below), whose sum is σ = 104510660592. Its totient is φ = 40187689920.

The previous prime is 66316880611. The next prime is 66316880621. The reversal of 66316880619 is 91608861366.

66316880619 is a `hidden beast` number, since 6 + 6 + 3 + 16 + 8 + 8 + 0 + 619 = 666.

It is not a de Polignac number, because 66316880619 - 2³ = 66316880611 is a prime.

It is a super-2 number, since 2×66316880619² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66316880611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1041957 + ... + 1103769.

It is an arithmetic number, because the mean of its divisors is an integer number (4354610858).

Almost surely, 2^66316880619 is an apocalyptic number.

66316880619 is a deficient number, since it is larger than the sum of its proper divisors (38193779973).

66316880619 is a wasteful number, since it uses less digits than its factorization.

66316880619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72667 (or 72664 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 66316880619 in words is "sixty-six billion, three hundred sixteen million, eight hundred eighty thousand, six hundred nineteen".