65801749 has 4 divisors (see below), whose sum is σ = 70863436. Its totient is φ = 60740064.

The previous prime is 65801741. The next prime is 65801753. The reversal of 65801749 is 94710856.

65801749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 14062500 + 51739249 = 3750^2 + 7193^2 .

It is a cyclic number.

It is not a de Polignac number, because 65801749 - 2³ = 65801741 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 (65801741) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2530824 + ... + 2530849.

It is an arithmetic number, because the mean of its divisors is an integer number (17715859).

Almost surely, 2^65801749 is an apocalyptic number.

It is an amenable number.

65801749 is a deficient number, since it is larger than the sum of its proper divisors (5061687).

65801749 is a wasteful number, since it uses less digits than its factorization.

65801749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5061686.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 65801749 is about 8111.8277225296. The cubic root of 65801749 is about 403.7189599348.

The spelling of 65801749 in words is "sixty-five million, eight hundred one thousand, seven hundred forty-nine".