3981747066 has 32 divisors (see below), whose sum is σ = 8700378048. Its totient is φ = 1204794240.

The previous prime is 3981747061. The next prime is 3981747073. The reversal of 3981747066 is 6607471893.

It is not an unprimeable number, because it can be changed into a prime (3981747061) 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, 126 + ... + 89238.

It is an arithmetic number, because the mean of its divisors is an integer number (271886814).

Almost surely, 2^3981747066 is an apocalyptic number.

3981747066 is an abundant number, since it is smaller than the sum of its proper divisors (4718630982).

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

3981747066 is a wasteful number, since it uses less digits than its factorization.

3981747066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89806.

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 3981747066 is about 63101.0860920793. The cubic root of 3981747066 is about 1584.9828093416.

The spelling of 3981747066 in words is "three billion, nine hundred eighty-one million, seven hundred forty-seven thousand, sixty-six".