13015666401 has 4 divisors (see below), whose sum is σ = 17354221872. Its totient is φ = 8677110932.

The previous prime is 13015666393. The next prime is 13015666423. The reversal of 13015666401 is 10466651031.

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 13015666401 - 2³ = 13015666393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13015666801) 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, 2169277731 + ... + 2169277736.

It is an arithmetic number, because the mean of its divisors is an integer number (4338555468).

Almost surely, 2^13015666401 is an apocalyptic number.

It is an amenable number.

13015666401 is a deficient number, since it is larger than the sum of its proper divisors (4338555471).

13015666401 is an equidigital number, since it uses as much as digits as its factorization.

13015666401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338555470.

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 13015666401 in words is "thirteen billion, fifteen million, six hundred sixty-six thousand, four hundred one".