7966618240 has 64 divisors (see below), whose sum is σ = 21765951360. Its totient is φ = 2731410432.

The previous prime is 7966618207. The next prime is 7966618241. The reversal of 7966618240 is 428166697.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (7966618241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884652 + ... + 893611.

It is an arithmetic number, because the mean of its divisors is an integer number (340092990).

Almost surely, 2^7966618240 is an apocalyptic number.

7966618240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7966618240 is an abundant number, since it is smaller than the sum of its proper divisors (13799333120).

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

7966618240 is a wasteful number, since it uses less digits than its factorization.

7966618240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778289 (or 1778277 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 7966618240 is about 89255.9143138425. The cubic root of 7966618240 is about 1997.2143084293.

The spelling of 7966618240 in words is "seven billion, nine hundred sixty-six million, six hundred eighteen thousand, two hundred forty".