6660946 has 4 divisors (see below), whose sum is σ = 9991422. Its totient is φ = 3330472.

The previous prime is 6660943. The next prime is 6660949. The reversal of 6660946 is 6490666.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6660943) and next prime (6660949).

It can be written as a sum of positive squares in only one way, i.e., 5313025 + 1347921 = 2305^2 + 1161^2 .

It is a super-2 number, since 2×6660946² = 88736403229832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6660943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1665235 + ... + 1665238.

Almost surely, 2^6660946 is an apocalyptic number.

6660946 is a deficient number, since it is larger than the sum of its proper divisors (3330476).

6660946 is a wasteful number, since it uses less digits than its factorization.

6660946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330475.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 6660946 is about 2580.8808573818. The cubic root of 6660946 is about 188.1533568363.

The spelling of 6660946 in words is "six million, six hundred sixty thousand, nine hundred forty-six".