55664423 has 2 divisors, whose sum is σ = 55664424. Its totient is φ = 55664422.

The previous prime is 55664419. The next prime is 55664431. The reversal of 55664423 is 32446655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55664423 - 2² = 55664419 is a prime.

It is a super-3 number, since 3×55664423³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55664473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27832211 + 27832212.

It is an arithmetic number, because the mean of its divisors is an integer number (27832212).

Almost surely, 2^55664423 is an apocalyptic number.

55664423 is a deficient number, since it is larger than the sum of its proper divisors (1).

55664423 is an equidigital number, since it uses as much as digits as its factorization.

55664423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 35.

The square root of 55664423 is about 7460.8594009001. The cubic root of 55664423 is about 381.8204957824.

The spelling of 55664423 in words is "fifty-five million, six hundred sixty-four thousand, four hundred twenty-three".