506701778 has 18 divisors (see below), whose sum is σ = 836007543. Its totient is φ = 230159820.

The previous prime is 506701763. The next prime is 506701787. The reversal of 506701778 is 877107605.

It can be written as a sum of positive squares in only one way, i.e., 253350889 + 253350889 = 15917^2 + 15917^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=15917.

It is a super-2 number, since 2×506701778² = 513493383656722568, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 349451 + ... + 350897.

Almost surely, 2^506701778 is an apocalyptic number.

506701778 is a deficient number, since it is larger than the sum of its proper divisors (329305765).

506701778 is an equidigital number, since it uses as much as digits as its factorization.

506701778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918 (or 1460 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 506701778 is about 22510.0372722926. The cubic root of 506701778 is about 797.2309357878.

The spelling of 506701778 in words is "five hundred six million, seven hundred one thousand, seven hundred seventy-eight".