65208421701 has 6 divisors (see below), whose sum is σ = 94189942470. Its totient is φ = 43472281128.

The previous prime is 65208421693. The next prime is 65208421717. The reversal of 65208421701 is 10712480256.

It can be written as a sum of positive squares in only one way, i.e., 57985121601 + 7223300100 = 240801^2 + 84990^2 .

It is not a de Polignac number, because 65208421701 - 2³ = 65208421693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65208421771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3622690086 + ... + 3622690103.

It is an arithmetic number, because the mean of its divisors is an integer number (15698323745).

Almost surely, 2^65208421701 is an apocalyptic number.

It is an amenable number.

65208421701 is a deficient number, since it is larger than the sum of its proper divisors (28981520769).

65208421701 is a wasteful number, since it uses less digits than its factorization.

65208421701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7245380195 (or 7245380192 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 65208421701 in words is "sixty-five billion, two hundred eight million, four hundred twenty-one thousand, seven hundred one".