2566420063 has 4 divisors (see below), whose sum is σ = 2678003568. Its totient is φ = 2454836560.

The previous prime is 2566420057. The next prime is 2566420067. The reversal of 2566420063 is 3600246652.

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-2566420063 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 (2566420067) 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 3 ways as a sum of consecutive naturals, for example, 55791718 + ... + 55791763.

It is an arithmetic number, because the mean of its divisors is an integer number (669500892).

Almost surely, 2^2566420063 is an apocalyptic number.

2566420063 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2566420063 is a deficient number, since it is larger than the sum of its proper divisors (111583505).

2566420063 is a wasteful number, since it uses less digits than its factorization.

2566420063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111583504.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 2566420063 is about 50659.8466539329. The cubic root of 2566420063 is about 1369.1233603550.

The spelling of 2566420063 in words is "two billion, five hundred sixty-six million, four hundred twenty thousand, sixty-three".