65947078361 has 4 divisors (see below), whose sum is σ = 66014166912. Its totient is φ = 65879989812.

The previous prime is 65947078349. The next prime is 65947078363. The reversal of 65947078361 is 16387074956.

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 65947078361 - 2²⁶ = 65879969497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65947078297 and 65947078306.

It is not an unprimeable number, because it can be changed into a prime (65947078363) 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, 33542801 + ... + 33544766.

It is an arithmetic number, because the mean of its divisors is an integer number (16503541728).

Almost surely, 2^65947078361 is an apocalyptic number.

It is an amenable number.

65947078361 is a deficient number, since it is larger than the sum of its proper divisors (67088551).

65947078361 is an equidigital number, since it uses as much as digits as its factorization.

65947078361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67088550.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 65947078361 in words is "sixty-five billion, nine hundred forty-seven million, seventy-eight thousand, three hundred sixty-one".