65427785 has 4 divisors (see below), whose sum is σ = 78513348. Its totient is φ = 52342224.

The previous prime is 65427767. The next prime is 65427787. The reversal of 65427785 is 58772456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25725184 + 39702601 = 5072^2 + 6301^2 .

It is a cyclic number.

It is not a de Polignac number, because 65427785 - 2¹² = 65423689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65427787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6542774 + ... + 6542783.

It is an arithmetic number, because the mean of its divisors is an integer number (19628337).

Almost surely, 2^65427785 is an apocalyptic number.

It is an amenable number.

65427785 is a deficient number, since it is larger than the sum of its proper divisors (13085563).

65427785 is a wasteful number, since it uses less digits than its factorization.

65427785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13085562.

The product of its digits is 470400, while the sum is 44.

The square root of 65427785 is about 8088.7443401309. The cubic root of 65427785 is about 402.9527023246.

The spelling of 65427785 in words is "sixty-five million, four hundred twenty-seven thousand, seven hundred eighty-five".