6691212 has 72 divisors (see below), whose sum is σ = 18821712. Its totient is φ = 1987200.

The previous prime is 6691207. The next prime is 6691219. The reversal of 6691212 is 2121966.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (6691219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24018 + ... + 24294.

Almost surely, 2^6691212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6691212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9410856).

6691212 is an abundant number, since it is smaller than the sum of its proper divisors (12130500).

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

6691212 is a wasteful number, since it uses less digits than its factorization.

6691212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 354 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 6691212 is about 2586.7377138009. The cubic root of 6691212 is about 188.4379033101.

It can be divided in two parts, 6691 and 212, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 6691212 in words is "six million, six hundred ninety-one thousand, two hundred twelve".