14660997391 has 12 divisors (see below), whose sum is σ = 15024202816. Its totient is φ = 14305011840.

The previous prime is 14660997389. The next prime is 14660997451. The reversal of 14660997391 is 19379906641.

It is a happy number.

It is not a de Polignac number, because 14660997391 - 2¹ = 14660997389 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14660997191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 473986 + ... + 503968.

Almost surely, 2^14660997391 is an apocalyptic number.

14660997391 is a deficient number, since it is larger than the sum of its proper divisors (363205425).

14660997391 is an frugal number, since it uses more digits than its factorization.

14660997391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30222 (or 30151 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 55.

The spelling of 14660997391 in words is "fourteen billion, six hundred sixty million, nine hundred ninety-seven thousand, three hundred ninety-one".