5621666423 has 8 divisors (see below), whose sum is σ = 5710459392. Its totient is φ = 5533017336.

The previous prime is 5621666411. The next prime is 5621666431. The reversal of 5621666423 is 3246661265.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5621666423 - 2²⁴ = 5604889207 is a prime.

It is a super-2 number, since 2×5621666423² = 63206266742971229858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621666483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44186 + ... + 114872.

It is an arithmetic number, because the mean of its divisors is an integer number (713807424).

Almost surely, 2^5621666423 is an apocalyptic number.

5621666423 is a deficient number, since it is larger than the sum of its proper divisors (88792969).

5621666423 is a wasteful number, since it uses less digits than its factorization.

5621666423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71941.

The product of its digits is 311040, while the sum is 41.

The square root of 5621666423 is about 74977.7728596949. The cubic root of 5621666423 is about 1778.0952590358.

The spelling of 5621666423 in words is "five billion, six hundred twenty-one million, six hundred sixty-six thousand, four hundred twenty-three".