6887211720 has 64 divisors (see below), whose sum is σ = 21328151040. Its totient is φ = 1777344000.

The previous prime is 6887211691. The next prime is 6887211733. The reversal of 6887211720 is 271127886.

It is a super-2 number, since 2×6887211720² = 94867370552210716800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 921981 + ... + 929420.

It is an arithmetic number, because the mean of its divisors is an integer number (333252360).

Almost surely, 2^6887211720 is an apocalyptic number.

6887211720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6887211720 is an abundant number, since it is smaller than the sum of its proper divisors (14440939320).

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

6887211720 is a wasteful number, since it uses less digits than its factorization.

6887211720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851446 (or 1851442 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 6887211720 is about 82989.2265297129. The cubic root of 6887211720 is about 1902.6013969510.

The spelling of 6887211720 in words is "six billion, eight hundred eighty-seven million, two hundred eleven thousand, seven hundred twenty".