7065406440 has 80 divisors (see below), whose sum is σ = 23747626980. Its totient is φ = 1884107520.

The previous prime is 7065406433. The next prime is 7065406463. The reversal of 7065406440 is 446045607.

7065406440 is a `hidden beast` number, since 7 + 0 + 6 + 5 + 4 + 0 + 644 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7057008036 + 8398404 = 84006^2 + 2898^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 7065406395 and 7065406404.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1087101 + ... + 1093580.

Almost surely, 2^7065406440 is an apocalyptic number.

It is an amenable number.

7065406440 is an abundant number, since it is smaller than the sum of its proper divisors (16682220540).

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

7065406440 is a wasteful number, since it uses less digits than its factorization.

7065406440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180704 (or 2180691 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 7065406440 is about 84055.9720662369. The cubic root of 7065406440 is about 1918.8707226472.

The spelling of 7065406440 in words is "seven billion, sixty-five million, four hundred six thousand, four hundred forty".