77444065 has 16 divisors (see below), whose sum is σ = 96454800. Its totient is φ = 59621632.

The previous prime is 77444053. The next prime is 77444069. The reversal of 77444065 is 56044477.

It can be written as a sum of positive squares in 8 ways, for example, as 1527696 + 75916369 = 1236^2 + 8713^2 .

It is a cyclic number.

It is not a de Polignac number, because 77444065 - 2⁵ = 77444033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77444069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55719 + ... + 57091.

It is an arithmetic number, because the mean of its divisors is an integer number (6028425).

Almost surely, 2^77444065 is an apocalyptic number.

It is an amenable number.

77444065 is a deficient number, since it is larger than the sum of its proper divisors (19010735).

77444065 is a wasteful number, since it uses less digits than its factorization.

77444065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 77444065 is about 8800.2309628782. The cubic root of 77444065 is about 426.2483526910.

The spelling of 77444065 in words is "seventy-seven million, four hundred forty-four thousand, sixty-five".