66386896674 has 96 divisors (see below), whose sum is σ = 158221172736. Its totient is φ = 18505700640.

The previous prime is 66386896649. The next prime is 66386896703. The reversal of 66386896674 is 47669868366.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66386896599 and 66386896608.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13739439 + ... + 13744269.

It is an arithmetic number, because the mean of its divisors is an integer number (1648137216).

Almost surely, 2^66386896674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66386896674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79110586368).

66386896674 is an abundant number, since it is smaller than the sum of its proper divisors (91834276062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66386896674 is a wasteful number, since it uses less digits than its factorization.

66386896674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5980 (or 5973 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 69.

The spelling of 66386896674 in words is "sixty-six billion, three hundred eighty-six million, eight hundred ninety-six thousand, six hundred seventy-four".