14781064661 has 4 divisors (see below), whose sum is σ = 16124797824. Its totient is φ = 13437331500.

The previous prime is 14781064657. The next prime is 14781064673. The reversal of 14781064661 is 16646018741.

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 14781064661 - 2² = 14781064657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14781064861) 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, 671866565 + ... + 671866586.

It is an arithmetic number, because the mean of its divisors is an integer number (4031199456).

Almost surely, 2^14781064661 is an apocalyptic number.

14781064661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

14781064661 is a deficient number, since it is larger than the sum of its proper divisors (1343733163).

14781064661 is a wasteful number, since it uses less digits than its factorization.

14781064661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343733162.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 14781064661 in words is "fourteen billion, seven hundred eighty-one million, sixty-four thousand, six hundred sixty-one".