7540660040 has 32 divisors (see below), whose sum is σ = 17551539000. Its totient is φ = 2912254464.

The previous prime is 7540660031. The next prime is 7540660073. The reversal of 7540660040 is 400660457.

It can be written as a sum of positive squares in 4 ways, for example, as 5706593764 + 1834066276 = 75542^2 + 42826^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7540659979 and 7540660006.

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, 3249125 + ... + 3251444.

Almost surely, 2^7540660040 is an apocalyptic number.

It is an amenable number.

7540660040 is an abundant number, since it is smaller than the sum of its proper divisors (10010878960).

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

7540660040 is a wasteful number, since it uses less digits than its factorization.

7540660040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6500609 (or 6500605 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 7540660040 is about 86836.9739224024. The cubic root of 7540660040 is about 1960.9647513467.

The spelling of 7540660040 in words is "seven billion, five hundred forty million, six hundred sixty thousand, forty".