2624047661 has 4 divisors (see below), whose sum is σ = 2624197500. Its totient is φ = 2623897824.

The previous prime is 2624047639. The next prime is 2624047663. The reversal of 2624047661 is 1667404262.

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 692005636 + 1932042025 = 26306^2 + 43955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2624047661 is a prime.

It is a super-2 number, since 2×2624047661² = 13771252254399141842, 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 (2624047663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44546 + ... + 85043.

It is an arithmetic number, because the mean of its divisors is an integer number (656049375).

Almost surely, 2^2624047661 is an apocalyptic number.

It is an amenable number.

2624047661 is a deficient number, since it is larger than the sum of its proper divisors (149839).

2624047661 is a wasteful number, since it uses less digits than its factorization.

2624047661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149838.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 2624047661 is about 51225.4591097044. The cubic root of 2624047661 is about 1379.2952469908.

The spelling of 2624047661 in words is "two billion, six hundred twenty-four million, forty-seven thousand, six hundred sixty-one".