23040064661 has 4 divisors (see below), whose sum is σ = 23041528992. Its totient is φ = 23038600332.

The previous prime is 23040064637. The next prime is 23040064667. The reversal of 23040064661 is 16646004032.

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 23040064661 - 2²² = 23035870357 is a prime.

It is a super-2 number, since 2×23040064661² (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 (23040064667) 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, 708305 + ... + 740118.

It is an arithmetic number, because the mean of its divisors is an integer number (5760382248).

Almost surely, 2^23040064661 is an apocalyptic number.

It is an amenable number.

23040064661 is a deficient number, since it is larger than the sum of its proper divisors (1464331).

23040064661 is a wasteful number, since it uses less digits than its factorization.

23040064661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464330.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 23040064661 its reverse (16646004032), we get a palindrome (39686068693).

The spelling of 23040064661 in words is "twenty-three billion, forty million, sixty-four thousand, six hundred sixty-one".