3231666440 has 16 divisors (see below), whose sum is σ = 7271249580. Its totient is φ = 1292666560.

The previous prime is 3231666377. The next prime is 3231666443. The reversal of 3231666440 is 446661323.

It can be written as a sum of positive squares in 2 ways, for example, as 2759821156 + 471845284 = 52534^2 + 21722^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3231666440.

It is not an unprimeable number, because it can be changed into a prime (3231666443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40395791 + ... + 40395870.

Almost surely, 2^3231666440 is an apocalyptic number.

It is an amenable number.

3231666440 is an abundant number, since it is smaller than the sum of its proper divisors (4039583140).

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

3231666440 is a wasteful number, since it uses less digits than its factorization.

3231666440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80791672 (or 80791668 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 3231666440 is about 56847.7478885488. The cubic root of 3231666440 is about 1478.4574932216.

The spelling of 3231666440 in words is "three billion, two hundred thirty-one million, six hundred sixty-six thousand, four hundred forty".