65947440745 has 8 divisors (see below), whose sum is σ = 79905249216. Its totient is φ = 52245739056.

The previous prime is 65947440721. The next prime is 65947440761. The reversal of 65947440745 is 54704474956.

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 65947440745 - 2⁷ = 65947440617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 64026127 + ... + 64027156.

It is an arithmetic number, because the mean of its divisors is an integer number (9988156152).

Almost surely, 2^65947440745 is an apocalyptic number.

It is an amenable number.

65947440745 is a deficient number, since it is larger than the sum of its proper divisors (13957808471).

65947440745 is a wasteful number, since it uses less digits than its factorization.

65947440745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128053391.

The product of its (nonzero) digits is 16934400, while the sum is 55.

The spelling of 65947440745 in words is "sixty-five billion, nine hundred forty-seven million, four hundred forty thousand, seven hundred forty-five".