8661497040 has 120 divisors (see below), whose sum is σ = 33243669888. Its totient is φ = 1979769600.

The previous prime is 8661497029. The next prime is 8661497051. The reversal of 8661497040 is 407941668.

It is an interprime number because it is at equal distance from previous prime (8661497029) and next prime (8661497051).

It is a tau number, because it is divible by the number of its divisors (120).

It is a hoax number, since the sum of its digits (45) 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 (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 854236 + ... + 864315.

Almost surely, 2^8661497040 is an apocalyptic number.

8661497040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8661497040 is an abundant number, since it is smaller than the sum of its proper divisors (24582172848).

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

8661497040 is a wasteful number, since it uses less digits than its factorization.

8661497040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718577 (or 1718568 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 8661497040 is about 93067.1641342960. The cubic root of 8661497040 is about 2053.6715515936.

The spelling of 8661497040 in words is "eight billion, six hundred sixty-one million, four hundred ninety-seven thousand, forty".