6621426023 has 4 divisors (see below), whose sum is σ = 6622845840. Its totient is φ = 6620006208.

The previous prime is 6621425971. The next prime is 6621426029. The reversal of 6621426023 is 3206241266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6621426023 - 2¹² = 6621421927 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 (6621426029) 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, 702890 + ... + 712247.

It is an arithmetic number, because the mean of its divisors is an integer number (1655711460).

Almost surely, 2^6621426023 is an apocalyptic number.

6621426023 is a deficient number, since it is larger than the sum of its proper divisors (1419817).

6621426023 is a wasteful number, since it uses less digits than its factorization.

6621426023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419816.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 6621426023 is about 81372.1452525371. The cubic root of 6621426023 is about 1877.8050835580.

Adding to 6621426023 its reverse (3206241266), we get a palindrome (9827667289).

The spelling of 6621426023 in words is "six billion, six hundred twenty-one million, four hundred twenty-six thousand, twenty-three".