7887667887 has 48 divisors (see below), whose sum is σ = 12713006592. Its totient is φ = 4671509760.

The previous prime is 7887667883. The next prime is 7887667913.

7887667887 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7887667887 - 2² = 7887667883 is a prime.

It is a super-2 number, since 2×7887667887² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7887667883) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6034288 + ... + 6035594.

It is an arithmetic number, because the mean of its divisors is an integer number (264854304).

Almost surely, 2^7887667887 is an apocalyptic number.

7887667887 is a deficient number, since it is larger than the sum of its proper divisors (4825338705).

7887667887 is a wasteful number, since it uses less digits than its factorization.

7887667887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668 (or 2665 counting only the distinct ones).

The product of its digits is 354041856, while the sum is 72.

The square root of 7887667887 is about 88812.5435228606. The cubic root of 7887667887 is about 1990.5948313139.

The spelling of 7887667887 in words is "seven billion, eight hundred eighty-seven million, six hundred sixty-seven thousand, eight hundred eighty-seven".