3967666000 has 40 divisors (see below), whose sum is σ = 9593821224. Its totient is φ = 1587065600.

The previous prime is 3967665971. The next prime is 3967666049. The reversal of 3967666000 is 6667693.

It can be written as a sum of positive squares in 4 ways, for example, as 92852496 + 3874813504 = 9636^2 + 62248^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 989917 + ... + 993916.

Almost surely, 2^3967666000 is an apocalyptic number.

It is an amenable number.

3967666000 is an abundant number, since it is smaller than the sum of its proper divisors (5626155224).

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

3967666000 is a wasteful number, since it uses less digits than its factorization.

3967666000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983856 (or 1983840 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 3967666000 is about 62989.4118086524. The cubic root of 3967666000 is about 1583.1122227401.

The spelling of 3967666000 in words is "three billion, nine hundred sixty-seven million, six hundred sixty-six thousand".