10665640547 has 4 divisors (see below), whose sum is σ = 10667777400. Its totient is φ = 10663503696.

The previous prime is 10665640543. The next prime is 10665640589. The reversal of 10665640547 is 74504656601.

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

It is a cyclic number.

It is not a de Polignac number, because 10665640547 - 2² = 10665640543 is a prime.

It is a super-2 number, since 2×10665640547² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10665640498 and 10665640507.

It is not an unprimeable number, because it can be changed into a prime (10665640543) 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, 1060922 + ... + 1070927.

It is an arithmetic number, because the mean of its divisors is an integer number (2666944350).

Almost surely, 2^10665640547 is an apocalyptic number.

10665640547 is a deficient number, since it is larger than the sum of its proper divisors (2136853).

10665640547 is an equidigital number, since it uses as much as digits as its factorization.

10665640547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136852.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 10665640547 in words is "ten billion, six hundred sixty-five million, six hundred forty thousand, five hundred forty-seven".