2206572778 has 16 divisors (see below), whose sum is σ = 3388182336. Its totient is φ = 1077199200.

The previous prime is 2206572721. The next prime is 2206572799. The reversal of 2206572778 is 8772756022.

It is a super-2 number, since 2×2206572778² = 9737926849221274568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377478 + ... + 383278.

It is an arithmetic number, because the mean of its divisors is an integer number (211761396).

Almost surely, 2^2206572778 is an apocalyptic number.

2206572778 is a deficient number, since it is larger than the sum of its proper divisors (1181609558).

2206572778 is a wasteful number, since it uses less digits than its factorization.

2206572778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10269.

The product of its (nonzero) digits is 658560, while the sum is 46.

The square root of 2206572778 is about 46974.1713923726. The cubic root of 2206572778 is about 1301.8853862015.

The spelling of 2206572778 in words is "two billion, two hundred six million, five hundred seventy-two thousand, seven hundred seventy-eight".