65551636601 has 4 divisors (see below), whose sum is σ = 71510876304. Its totient is φ = 59592396900.

The previous prime is 65551636589. The next prime is 65551636607. The reversal of 65551636601 is 10663615556.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65551636601 - 2³⁰ = 64477894777 is a prime.

It is a super-2 number, since 2×65551636601² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65551636607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2979619835 + ... + 2979619856.

It is an arithmetic number, because the mean of its divisors is an integer number (17877719076).

Almost surely, 2^65551636601 is an apocalyptic number.

It is an amenable number.

65551636601 is a deficient number, since it is larger than the sum of its proper divisors (5959239703).

65551636601 is a wasteful number, since it uses less digits than its factorization.

65551636601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5959239702.

The product of its (nonzero) digits is 486000, while the sum is 44.

The spelling of 65551636601 in words is "sixty-five billion, five hundred fifty-one million, six hundred thirty-six thousand, six hundred one".