13465406661 has 16 divisors (see below), whose sum is σ = 20521041024. Its totient is φ = 7693645824.

The previous prime is 13465406659. The next prime is 13465406663. The reversal of 13465406661 is 16660456431.

It is an interprime number because it is at equal distance from previous prime (13465406659) and next prime (13465406663).

It is not a de Polignac number, because 13465406661 - 2¹ = 13465406659 is a prime.

It is a super-2 number, since 2×13465406661² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13465406663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184525 + ... + 246941.

It is an arithmetic number, because the mean of its divisors is an integer number (1282565064).

Almost surely, 2^13465406661 is an apocalyptic number.

It is an amenable number.

13465406661 is a deficient number, since it is larger than the sum of its proper divisors (7055634363).

13465406661 is a wasteful number, since it uses less digits than its factorization.

13465406661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72700.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 13465406661 in words is "thirteen billion, four hundred sixty-five million, four hundred six thousand, six hundred sixty-one".