6996581 has 4 divisors (see below), whose sum is σ = 7002912. Its totient is φ = 6990252.

The previous prime is 6996559. The next prime is 6996611. The reversal of 6996581 is 1856996.

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, 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 6996581 - 2¹⁰ = 6995557 is a prime.

It is a super-2 number, since 2×6996581² = 97904291379122, which contains 22 as substring.

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 (6996181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025 + ... + 3878.

It is an arithmetic number, because the mean of its divisors is an integer number (1750728).

Almost surely, 2^6996581 is an apocalyptic number.

It is an amenable number.

6996581 is a deficient number, since it is larger than the sum of its proper divisors (6331).

6996581 is a wasteful number, since it uses less digits than its factorization.

6996581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6330.

The product of its digits is 116640, while the sum is 44.

The square root of 6996581 is about 2645.1051018816. The cubic root of 6996581 is about 191.2619688638.

The spelling of 6996581 in words is "six million, nine hundred ninety-six thousand, five hundred eighty-one".