65745247 has 4 divisors (see below), whose sum is σ = 68603760. Its totient is φ = 62886736.

The previous prime is 65745241. The next prime is 65745269. The reversal of 65745247 is 74254756.

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

It is a cyclic number.

It is not a de Polignac number, because 65745247 - 2²³ = 57356639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65745241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429222 + ... + 1429267.

It is an arithmetic number, because the mean of its divisors is an integer number (17150940).

Almost surely, 2^65745247 is an apocalyptic number.

65745247 is a deficient number, since it is larger than the sum of its proper divisors (2858513).

65745247 is a wasteful number, since it uses less digits than its factorization.

65745247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858512.

The product of its digits is 235200, while the sum is 40.

The square root of 65745247 is about 8108.3442822811. The cubic root of 65745247 is about 403.6033730335.

The spelling of 65745247 in words is "sixty-five million, seven hundred forty-five thousand, two hundred forty-seven".