65729669897 has 4 divisors (see below), whose sum is σ = 66202545360. Its totient is φ = 65256794436.

The previous prime is 65729669893. The next prime is 65729669899. The reversal of 65729669897 is 79896692756.

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 65729669897 - 2² = 65729669893 is a prime.

It is a super-3 number, since 3×65729669897³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65729669891) 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, 236437523 + ... + 236437800.

It is an arithmetic number, because the mean of its divisors is an integer number (16550636340).

Almost surely, 2^65729669897 is an apocalyptic number.

It is an amenable number.

65729669897 is a deficient number, since it is larger than the sum of its proper divisors (472875463).

65729669897 is a wasteful number, since it uses less digits than its factorization.

65729669897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472875462.

The product of its digits is 617258880, while the sum is 74.

The spelling of 65729669897 in words is "sixty-five billion, seven hundred twenty-nine million, six hundred sixty-nine thousand, eight hundred ninety-seven".