264066778 has 16 divisors (see below), whose sum is σ = 399724200. Its totient is φ = 130830336.

The previous prime is 264066757. The next prime is 264066791. The reversal of 264066778 is 877660462.

It can be written as a sum of positive squares in 4 ways, for example, as 140256649 + 123810129 = 11843^2 + 11127^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 140050 + ... + 141922.

Almost surely, 2^264066778 is an apocalyptic number.

264066778 is a deficient number, since it is larger than the sum of its proper divisors (135657422).

264066778 is a wasteful number, since it uses less digits than its factorization.

264066778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481.

The product of its (nonzero) digits is 677376, while the sum is 46.

The square root of 264066778 is about 16250.1316302361. The cubic root of 264066778 is about 641.5609505118.

The spelling of 264066778 in words is "two hundred sixty-four million, sixty-six thousand, seven hundred seventy-eight".