5557778 has 6 divisors (see below), whose sum is σ = 8341671. Its totient is φ = 2777222.

The previous prime is 5557757. The next prime is 5557781. The reversal of 5557778 is 8777555.

It can be written as a sum of positive squares in only one way, i.e., 2778889 + 2778889 = 1667^2 + 1667^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1667.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2501 + ... + 4167.

Almost surely, 2^5557778 is an apocalyptic number.

5557778 is a deficient number, since it is larger than the sum of its proper divisors (2783893).

5557778 is an frugal number, since it uses more digits than its factorization.

5557778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336 (or 1669 counting only the distinct ones).

The product of its digits is 343000, while the sum is 44.

The square root of 5557778 is about 2357.4940084759. The cubic root of 5557778 is about 177.1333753782.

It can be divided in two parts, 55577 and 78, that added together give a palindrome (55655).

The spelling of 5557778 in words is "five million, five hundred fifty-seven thousand, seven hundred seventy-eight".