65693994547 has 4 divisors (see below), whose sum is σ = 65734825240. Its totient is φ = 65653163856.

The previous prime is 65693994497. The next prime is 65693994577. The reversal of 65693994547 is 74549939656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65693994547 - 2¹¹ = 65693992499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65693994577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20412933 + ... + 20416150.

It is an arithmetic number, because the mean of its divisors is an integer number (16433706310).

Almost surely, 2^65693994547 is an apocalyptic number.

65693994547 is a deficient number, since it is larger than the sum of its proper divisors (40830693).

65693994547 is a wasteful number, since it uses less digits than its factorization.

65693994547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40830692.

The product of its digits is 220449600, while the sum is 67.

The spelling of 65693994547 in words is "sixty-five billion, six hundred ninety-three million, nine hundred ninety-four thousand, five hundred forty-seven".