56620777 has 2 divisors, whose sum is σ = 56620778. Its totient is φ = 56620776.

The previous prime is 56620769. The next prime is 56620793. The reversal of 56620777 is 77702665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56610576 + 10201 = 7524^2 + 101^2 .

It is a cyclic number.

It is not a de Polignac number, because 56620777 - 2³ = 56620769 is a prime.

It is not a weakly prime, because it can be changed into another prime (56620747) by changing a digit.

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 as a sum of consecutive naturals, namely, 28310388 + 28310389.

It is an arithmetic number, because the mean of its divisors is an integer number (28310389).

Almost surely, 2^56620777 is an apocalyptic number.

It is an amenable number.

56620777 is a deficient number, since it is larger than the sum of its proper divisors (1).

56620777 is an equidigital number, since it uses as much as digits as its factorization.

56620777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 56620777 is about 7524.6778668592. The cubic root of 56620777 is about 383.9947396017.

The spelling of 56620777 in words is "fifty-six million, six hundred twenty thousand, seven hundred seventy-seven".