65886009493 has 4 divisors (see below), whose sum is σ = 65887246188. Its totient is φ = 65884772800.

The previous prime is 65886009491. The next prime is 65886009533. The reversal of 65886009493 is 39490068856.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17566056369 + 48319953124 = 132537^2 + 219818^2 .

It is a cyclic number.

It is not a de Polignac number, because 65886009493 - 2¹ = 65886009491 is a prime.

It is a super-2 number, since 2×65886009493² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65886009491) 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, 534658 + ... + 646243.

It is an arithmetic number, because the mean of its divisors is an integer number (16471811547).

Almost surely, 2^65886009493 is an apocalyptic number.

It is an amenable number.

65886009493 is a deficient number, since it is larger than the sum of its proper divisors (1236695).

65886009493 is a wasteful number, since it uses less digits than its factorization.

65886009493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236694.

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 65886009493 in words is "sixty-five billion, eight hundred eighty-six million, nine thousand, four hundred ninety-three".