65850421201 has 4 divisors (see below), whose sum is σ = 66353096304. Its totient is φ = 65347746100.

The previous prime is 65850421199. The next prime is 65850421223. The reversal of 65850421201 is 10212405856.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65850421201 - 2¹ = 65850421199 is a prime.

It is a super-2 number, since 2×65850421201² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65850421291) 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, 251337355 + ... + 251337616.

It is an arithmetic number, because the mean of its divisors is an integer number (16588274076).

Almost surely, 2^65850421201 is an apocalyptic number.

It is an amenable number.

65850421201 is a deficient number, since it is larger than the sum of its proper divisors (502675103).

65850421201 is a wasteful number, since it uses less digits than its factorization.

65850421201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502675102.

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 65850421201 in words is "sixty-five billion, eight hundred fifty million, four hundred twenty-one thousand, two hundred one".