6757661 has 4 divisors (see below), whose sum is σ = 6922524. Its totient is φ = 6592800.

The previous prime is 6757657. The next prime is 6757669. The reversal of 6757661 is 1667576.

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

It can be written as a sum of positive squares in 2 ways, for example, as 755161 + 6002500 = 869^2 + 2450^2 .

It is not a de Polignac number, because 6757661 - 2² = 6757657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6757669) 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, 82370 + ... + 82451.

It is an arithmetic number, because the mean of its divisors is an integer number (1730631).

Almost surely, 2^6757661 is an apocalyptic number.

It is an amenable number.

6757661 is a deficient number, since it is larger than the sum of its proper divisors (164863).

6757661 is a wasteful number, since it uses less digits than its factorization.

6757661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164862.

The product of its digits is 52920, while the sum is 38.

The square root of 6757661 is about 2599.5501533919. The cubic root of 6757661 is about 189.0596286384.

The spelling of 6757661 in words is "six million, seven hundred fifty-seven thousand, six hundred sixty-one".