555266623 has 2 divisors, whose sum is σ = 555266624. Its totient is φ = 555266622.

The previous prime is 555266609. The next prime is 555266629. The reversal of 555266623 is 326662555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 555266623 - 2¹⁷ = 555135551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555266629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277633311 + 277633312.

It is an arithmetic number, because the mean of its divisors is an integer number (277633312).

Almost surely, 2^555266623 is an apocalyptic number.

555266623 is a deficient number, since it is larger than the sum of its proper divisors (1).

555266623 is an equidigital number, since it uses as much as digits as its factorization.

555266623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 40.

The square root of 555266623 is about 23564.0960573496. The cubic root of 555266623 is about 821.9281529388.

The spelling of 555266623 in words is "five hundred fifty-five million, two hundred sixty-six thousand, six hundred twenty-three".