6699870 has 96 divisors (see below), whose sum is σ = 19206720. Its totient is φ = 1612800.

The previous prime is 6699859. The next prime is 6699871. The reversal of 6699870 is 789966.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699871) 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, 44295 + ... + 44445.

It is an arithmetic number, because the mean of its divisors is an integer number (200070).

Almost surely, 2^6699870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6699870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9603360).

6699870 is an abundant number, since it is smaller than the sum of its proper divisors (12506850).

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

6699870 is a wasteful number, since it uses less digits than its factorization.

6699870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 6699870 is about 2588.4107092963. The cubic root of 6699870 is about 188.5191438083.

It can be divided in two parts, 6699 and 870, that added together give a square (7569 = 87²).

The spelling of 6699870 in words is "six million, six hundred ninety-nine thousand, eight hundred seventy".