77145065 has 8 divisors (see below), whose sum is σ = 98019720. Its totient is φ = 58085632.

The previous prime is 77145049. The next prime is 77145083. The reversal of 77145065 is 56054177.

It can be written as a sum of positive squares in 4 ways, for example, as 7722841 + 69422224 = 2779^2 + 8332^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77145065 - 2⁴ = 77145049 is a prime.

It is a super-2 number, since 2×77145065² = 11902722107708450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453710 + ... + 453879.

It is an arithmetic number, because the mean of its divisors is an integer number (12252465).

Almost surely, 2^77145065 is an apocalyptic number.

It is an amenable number.

77145065 is a deficient number, since it is larger than the sum of its proper divisors (20874655).

77145065 is a wasteful number, since it uses less digits than its factorization.

77145065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907611.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 77145065 is about 8783.2263434344. The cubic root of 77145065 is about 425.6990847355.

The spelling of 77145065 in words is "seventy-seven million, one hundred forty-five thousand, sixty-five".