6665946 has 32 divisors (see below), whose sum is σ = 15595008. Its totient is φ = 1859760.

The previous prime is 6665927. The next prime is 6665947. The reversal of 6665946 is 6495666.

6665946 = 105² + 106² + ... + 276².

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6665898 and 6665907.

It is not an unprimeable number, because it can be changed into a prime (6665947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40 + ... + 3651.

It is an arithmetic number, because the mean of its divisors is an integer number (487344).

Almost surely, 2^6665946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6665946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7797504).

6665946 is an abundant number, since it is smaller than the sum of its proper divisors (8929062).

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

6665946 is a wasteful number, since it uses less digits than its factorization.

6665946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746.

The product of its digits is 233280, while the sum is 42.

The square root of 6665946 is about 2581.8493372000. The cubic root of 6665946 is about 188.2004237988.

The spelling of 6665946 in words is "six million, six hundred sixty-five thousand, nine hundred forty-six".