2566820167449 has 16 divisors (see below), whose sum is σ = 3437011357824. Its totient is φ = 1703922796800.

The previous prime is 2566820167411. The next prime is 2566820167487. The reversal of 2566820167449 is 9447610286652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2566820167411) and next prime (2566820167487).

It is not a de Polignac number, because 2566820167449 - 2⁸ = 2566820167193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2566820167392 and 2566820167401.

It is not an unprimeable number, because it can be changed into a prime (2566820160449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6438564 + ... + 6825594.

It is an arithmetic number, because the mean of its divisors is an integer number (214813209864).

Almost surely, 2^{2566820167449} is an apocalyptic number.

It is an amenable number.

2566820167449 is a deficient number, since it is larger than the sum of its proper divisors (870191190375).

2566820167449 is a wasteful number, since it uses less digits than its factorization.

2566820167449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396448.

The product of its (nonzero) digits is 34836480, while the sum is 60.

The spelling of 2566820167449 in words is "two trillion, five hundred sixty-six billion, eight hundred twenty million, one hundred sixty-seven thousand, four hundred forty-nine".