6623460521 has 4 divisors (see below), whose sum is σ = 6623675844. Its totient is φ = 6623245200.

The previous prime is 6623460461. The next prime is 6623460587. The reversal of 6623460521 is 1250643266.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1250643266 = 2 ⋅625321633.

It can be written as a sum of positive squares in 2 ways, for example, as 4738945600 + 1884514921 = 68840^2 + 43411^2 .

It is a cyclic number.

It is not a de Polignac number, because 6623460521 - 2¹⁰ = 6623459497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6623460421) 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, 51890 + ... + 126251.

It is an arithmetic number, because the mean of its divisors is an integer number (1655918961).

Almost surely, 2^6623460521 is an apocalyptic number.

It is an amenable number.

6623460521 is a deficient number, since it is larger than the sum of its proper divisors (215323).

6623460521 is a wasteful number, since it uses less digits than its factorization.

6623460521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215322.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 6623460521 is about 81384.6454867256. The cubic root of 6623460521 is about 1877.9973885316.

The spelling of 6623460521 in words is "six billion, six hundred twenty-three million, four hundred sixty thousand, five hundred twenty-one".