8661090040 has 32 divisors (see below), whose sum is σ = 19496764080. Its totient is φ = 3462780672.

The previous prime is 8661090023. The next prime is 8661090071. The reversal of 8661090040 is 400901668.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8661089978 and 8661090005.

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, 34819 + ... + 136141.

Almost surely, 2^8661090040 is an apocalyptic number.

It is an amenable number.

8661090040 is an abundant number, since it is smaller than the sum of its proper divisors (10835674040).

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

8661090040 is a wasteful number, since it uses less digits than its factorization.

8661090040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103471 (or 103467 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 8661090040 is about 93064.9775157121. The cubic root of 8661090040 is about 2053.6393840437.

The spelling of 8661090040 in words is "eight billion, six hundred sixty-one million, ninety thousand, forty".