6557951 has 4 divisors (see below), whose sum is σ = 6582600. Its totient is φ = 6533304.

The previous prime is 6557939. The next prime is 6557963. The reversal of 6557951 is 1597556.

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 (6557939) and next prime (6557963).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6557951 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 (6557981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11921 + ... + 12458.

It is an arithmetic number, because the mean of its divisors is an integer number (1645650).

Almost surely, 2^6557951 is an apocalyptic number.

6557951 is a deficient number, since it is larger than the sum of its proper divisors (24649).

6557951 is a wasteful number, since it uses less digits than its factorization.

6557951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24648.

The product of its digits is 47250, while the sum is 38.

The square root of 6557951 is about 2560.8496636859. The cubic root of 6557951 is about 187.1785401503.

The spelling of 6557951 in words is "six million, five hundred fifty-seven thousand, nine hundred fifty-one".