65973647 has 4 divisors (see below), whose sum is σ = 66130776. Its totient is φ = 65816520.

The previous prime is 65973641. The next prime is 65973659. The reversal of 65973647 is 74637956.

It is a happy number.

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 65973647 - 2¹² = 65969551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65973641) 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, 77933 + ... + 78774.

It is an arithmetic number, because the mean of its divisors is an integer number (16532694).

Almost surely, 2^65973647 is an apocalyptic number.

65973647 is a deficient number, since it is larger than the sum of its proper divisors (157129).

65973647 is a wasteful number, since it uses less digits than its factorization.

65973647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157128.

The product of its digits is 952560, while the sum is 47.

The square root of 65973647 is about 8122.4163276700. The cubic root of 65973647 is about 404.0702076299.

The spelling of 65973647 in words is "sixty-five million, nine hundred seventy-three thousand, six hundred forty-seven".