6617551 has 4 divisors (see below), whose sum is σ = 6622704. Its totient is φ = 6612400.

The previous prime is 6617543. The next prime is 6617557. The reversal of 6617551 is 1557166.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6617551 - 2³ = 6617543 is a prime.

It is a Duffinian number.

6617551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6617557) 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, 1086 + ... + 3796.

It is an arithmetic number, because the mean of its divisors is an integer number (1655676).

Almost surely, 2^6617551 is an apocalyptic number.

6617551 is a deficient number, since it is larger than the sum of its proper divisors (5153).

6617551 is a wasteful number, since it uses less digits than its factorization.

6617551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152.

The product of its digits is 6300, while the sum is 31.

The square root of 6617551 is about 2572.4601065906. The cubic root of 6617551 is about 187.7438699348.

The spelling of 6617551 in words is "six million, six hundred seventeen thousand, five hundred fifty-one".