65664072947 has 16 divisors (see below), whose sum is σ = 72519874560. Its totient is φ = 58956458400.

The previous prime is 65664072911. The next prime is 65664072961. The reversal of 65664072947 is 74927046656.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65664072947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65664072892 and 65664072901.

It is not an unprimeable number, because it can be changed into a prime (65664002947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3376622 + ... + 3396012.

It is an arithmetic number, because the mean of its divisors is an integer number (4532492160).

Almost surely, 2^65664072947 is an apocalyptic number.

65664072947 is a deficient number, since it is larger than the sum of its proper divisors (6855801613).

65664072947 is a wasteful number, since it uses less digits than its factorization.

65664072947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23194.

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 65664072947 in words is "sixty-five billion, six hundred sixty-four million, seventy-two thousand, nine hundred forty-seven".