65681967601 has 8 divisors (see below), whose sum is σ = 69664099680. Its totient is φ = 61713000768.

The previous prime is 65681967511. The next prime is 65681967647. The reversal of 65681967601 is 10676918656.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65681967601 - 2²¹ = 65679870449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65681367601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3281031 + ... + 3300988.

It is an arithmetic number, because the mean of its divisors is an integer number (8708012460).

Almost surely, 2^65681967601 is an apocalyptic number.

It is an amenable number.

65681967601 is a deficient number, since it is larger than the sum of its proper divisors (3982132079).

65681967601 is a wasteful number, since it uses less digits than its factorization.

65681967601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6582623.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 65681967601 in words is "sixty-five billion, six hundred eighty-one million, nine hundred sixty-seven thousand, six hundred one".