65750849421 has 16 divisors (see below), whose sum is σ = 90539078400. Its totient is φ = 42419218688.

The previous prime is 65750849419. The next prime is 65750849449. The reversal of 65750849421 is 12494805756.

It is a cyclic number.

It is not a de Polignac number, because 65750849421 - 2¹ = 65750849419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65750849921) 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, 2607216 + ... + 2632313.

It is an arithmetic number, because the mean of its divisors is an integer number (5658692400).

Almost surely, 2^65750849421 is an apocalyptic number.

It is an amenable number.

65750849421 is a deficient number, since it is larger than the sum of its proper divisors (24788228979).

65750849421 is a wasteful number, since it uses less digits than its factorization.

65750849421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239668.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 65750849421 in words is "sixty-five billion, seven hundred fifty million, eight hundred forty-nine thousand, four hundred twenty-one".