65406023663 has 4 divisors (see below), whose sum is σ = 65408327328. Its totient is φ = 65403720000.

The previous prime is 65406023651. The next prime is 65406023677. The reversal of 65406023663 is 36632060456.

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 65406023663 - 2¹⁴ = 65406007279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65406023663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65406023563) 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, 1108706 + ... + 1166207.

It is an arithmetic number, because the mean of its divisors is an integer number (16352081832).

Almost surely, 2^65406023663 is an apocalyptic number.

65406023663 is a deficient number, since it is larger than the sum of its proper divisors (2303665).

65406023663 is a wasteful number, since it uses less digits than its factorization.

65406023663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303664.

The product of its (nonzero) digits is 466560, while the sum is 41.

The spelling of 65406023663 in words is "sixty-five billion, four hundred six million, twenty-three thousand, six hundred sixty-three".