6677661 has 4 divisors (see below), whose sum is σ = 8903552. Its totient is φ = 4451772.

The previous prime is 6677641. The next prime is 6677663. The reversal of 6677661 is 1667766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6677661 - 2⁶ = 6677597 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6677663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112941 + ... + 1112946.

It is an arithmetic number, because the mean of its divisors is an integer number (2225888).

Almost surely, 2^6677661 is an apocalyptic number.

It is an amenable number.

6677661 is a deficient number, since it is larger than the sum of its proper divisors (2225891).

6677661 is a wasteful number, since it uses less digits than its factorization.

6677661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225890.

The product of its digits is 63504, while the sum is 39.

The square root of 6677661 is about 2584.1170639118. The cubic root of 6677661 is about 188.3106095920.

The spelling of 6677661 in words is "six million, six hundred seventy-seven thousand, six hundred sixty-one".