3966694816 has 96 divisors (see below), whose sum is σ = 9565274880. Its totient is φ = 1582073856.

The previous prime is 3966694801. The next prime is 3966694819. The reversal of 3966694816 is 6184966693.

It is not an unprimeable number, because it can be changed into a prime (3966694819) 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, 180220 + ... + 201028.

It is an arithmetic number, because the mean of its divisors is an integer number (99638280).

Almost surely, 2^3966694816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3966694816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4782637440).

3966694816 is an abundant number, since it is smaller than the sum of its proper divisors (5598580064).

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

3966694816 is a wasteful number, since it uses less digits than its factorization.

3966694816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20886 (or 20878 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 58.

The square root of 3966694816 is about 62981.7022316800. The cubic root of 3966694816 is about 1582.9830436270.

The spelling of 3966694816 in words is "three billion, nine hundred sixty-six million, six hundred ninety-four thousand, eight hundred sixteen".