6661546 has 4 divisors (see below), whose sum is σ = 9992322. Its totient is φ = 3330772.

The previous prime is 6661511. The next prime is 6661547. The reversal of 6661546 is 6451666.

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

It can be written as a sum of positive squares in only one way, i.e., 4456321 + 2205225 = 2111^2 + 1485^2 .

It is a super-2 number, since 2×6661546² = 88752390220232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6661547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1665385 + ... + 1665388.

Almost surely, 2^6661546 is an apocalyptic number.

6661546 is a deficient number, since it is larger than the sum of its proper divisors (3330776).

6661546 is a wasteful number, since it uses less digits than its factorization.

6661546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330775.

The product of its digits is 25920, while the sum is 34.

The square root of 6661546 is about 2580.9970941479. The cubic root of 6661546 is about 188.1590061151.

The spelling of 6661546 in words is "six million, six hundred sixty-one thousand, five hundred forty-six".