65545747660799 has 4 divisors (see below), whose sum is σ = 74909425898064. Its totient is φ = 56182069423536.

The previous prime is 65545747660741. The next prime is 65545747660819. The reversal of 65545747660799 is 99706674754556.

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

It is not a de Polignac number, because 65545747660799 - 2¹² = 65545747656703 is a prime.

It is a super-3 number, since 3×65545747660799³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65545747660699) 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, 4681839118622 + ... + 4681839118635.

It is an arithmetic number, because the mean of its divisors is an integer number (18727356474516).

Almost surely, 2^{65545747660799} is an apocalyptic number.

65545747660799 is a deficient number, since it is larger than the sum of its proper divisors (9363678237265).

65545747660799 is an equidigital number, since it uses as much as digits as its factorization.

65545747660799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9363678237264.

The product of its (nonzero) digits is 12002256000, while the sum is 80.

The spelling of 65545747660799 in words is "sixty-five trillion, five hundred forty-five billion, seven hundred forty-seven million, six hundred sixty thousand, seven hundred ninety-nine".