6543690 has 32 divisors (see below), whose sum is σ = 15975360. Its totient is φ = 1714944.

The previous prime is 6543683. The next prime is 6543701. The reversal of 6543690 is 963456.

6543690 = 1142² + 1143² + ... + 1146².

It is a happy number.

It is a super-2 number, since 2×6543690² = 85639757632200, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

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, 79 + ... + 3618.

It is an arithmetic number, because the mean of its divisors is an integer number (499230).

Almost surely, 2^6543690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6543690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7987680).

6543690 is an abundant number, since it is smaller than the sum of its proper divisors (9431670).

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

6543690 is a wasteful number, since it uses less digits than its factorization.

6543690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3766.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 6543690 is about 2558.0637208639. The cubic root of 6543690 is about 187.0427614374.

The spelling of 6543690 in words is "six million, five hundred forty-three thousand, six hundred ninety".