7875667440 has 60 divisors (see below), whose sum is σ = 26449118904. Its totient is φ = 2100177792.

The previous prime is 7875667439. The next prime is 7875667453. The reversal of 7875667440 is 447665787.

7875667440 is a `hidden beast` number, since 7 + 8 + 7 + 566 + 74 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×7875667440² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5468494 + ... + 5469933.

Almost surely, 2^7875667440 is an apocalyptic number.

It is an amenable number.

7875667440 is an abundant number, since it is smaller than the sum of its proper divisors (18573451464).

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

7875667440 is a wasteful number, since it uses less digits than its factorization.

7875667440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10938446 (or 10938437 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 54.

The square root of 7875667440 is about 88744.9572651877. The cubic root of 7875667440 is about 1989.5848093856.

The spelling of 7875667440 in words is "seven billion, eight hundred seventy-five million, six hundred sixty-seven thousand, four hundred forty".