7987525669 has 4 divisors (see below), whose sum is σ = 8122907520. Its totient is φ = 7852143820.

The previous prime is 7987525661. The next prime is 7987525699. The reversal of 7987525669 is 9665257897.

7987525669 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7987525669 - 2³ = 7987525661 is a prime.

It is a super-2 number, since 2×7987525669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7987525669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7987525661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67690837 + ... + 67690954.

It is an arithmetic number, because the mean of its divisors is an integer number (2030726880).

Almost surely, 2^7987525669 is an apocalyptic number.

It is an amenable number.

7987525669 is a deficient number, since it is larger than the sum of its proper divisors (135381851).

7987525669 is a wasteful number, since it uses less digits than its factorization.

7987525669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135381850.

The product of its digits is 57153600, while the sum is 64.

The square root of 7987525669 is about 89372.9582647906. The cubic root of 7987525669 is about 1998.9599316393.

The spelling of 7987525669 in words is "seven billion, nine hundred eighty-seven million, five hundred twenty-five thousand, six hundred sixty-nine".