10656664505 has 8 divisors (see below), whose sum is σ = 12854951424. Its totient is φ = 8480695600.

The previous prime is 10656664493. The next prime is 10656664507. The reversal of 10656664505 is 50546665601.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10656664505 - 2⁶ = 10656664441 is a prime.

It is a super-2 number, since 2×10656664505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10656664507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5578451 + ... + 5580360.

It is an arithmetic number, because the mean of its divisors is an integer number (1606868928).

Almost surely, 2^10656664505 is an apocalyptic number.

It is an amenable number.

10656664505 is a deficient number, since it is larger than the sum of its proper divisors (2198286919).

10656664505 is a wasteful number, since it uses less digits than its factorization.

10656664505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11159007.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 10656664505 in words is "ten billion, six hundred fifty-six million, six hundred sixty-four thousand, five hundred five".