6711988 has 6 divisors (see below), whose sum is σ = 11745986. Its totient is φ = 3355992.

The previous prime is 6711983. The next prime is 6711989. The reversal of 6711988 is 8891176.

It can be written as a sum of positive squares in only one way, i.e., 4485924 + 2226064 = 2118^2 + 1492^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6711988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6711983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 838995 + ... + 839002.

Almost surely, 2^6711988 is an apocalyptic number.

It is an amenable number.

6711988 is a deficient number, since it is larger than the sum of its proper divisors (5033998).

6711988 is a wasteful number, since it uses less digits than its factorization.

6711988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678001 (or 1677999 counting only the distinct ones).

The product of its digits is 24192, while the sum is 40.

The square root of 6711988 is about 2590.7504704236. The cubic root of 6711988 is about 188.6327330303.

The spelling of 6711988 in words is "six million, seven hundred eleven thousand, nine hundred eighty-eight".