55666423 has 4 divisors (see below), whose sum is σ = 55759648. Its totient is φ = 55573200.

The previous prime is 55666393. The next prime is 55666427. The reversal of 55666423 is 32466655.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55666423 is a prime.

It is a super-2 number, since 2×55666423² = 6197501299229858, 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 (55666427) 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, 45711 + ... + 46912.

It is an arithmetic number, because the mean of its divisors is an integer number (13939912).

Almost surely, 2^55666423 is an apocalyptic number.

55666423 is a deficient number, since it is larger than the sum of its proper divisors (93225).

55666423 is an equidigital number, since it uses as much as digits as its factorization.

55666423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93224.

The product of its digits is 129600, while the sum is 37.

The square root of 55666423 is about 7460.9934325129. The cubic root of 55666423 is about 381.8250686125.

The spelling of 55666423 in words is "fifty-five million, six hundred sixty-six thousand, four hundred twenty-three".