65366417421 has 32 divisors (see below), whose sum is σ = 102072268800. Its totient is φ = 41228838000.

The previous prime is 65366417419. The next prime is 65366417471. The reversal of 65366417421 is 12471466356.

65366417421 is a `hidden beast` number, since 6 + 536 + 6 + 41 + 74 + 2 + 1 = 666.

It is not a de Polignac number, because 65366417421 - 2¹ = 65366417419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65366417471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300430 + ... + 470096.

It is an arithmetic number, because the mean of its divisors is an integer number (3189758400).

Almost surely, 2^65366417421 is an apocalyptic number.

It is an amenable number.

65366417421 is a deficient number, since it is larger than the sum of its proper divisors (36705851379).

65366417421 is a wasteful number, since it uses less digits than its factorization.

65366417421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170446 (or 170440 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 65366417421 in words is "sixty-five billion, three hundred sixty-six million, four hundred seventeen thousand, four hundred twenty-one".