15066111661 has 4 divisors (see below), whose sum is σ = 15067757952. Its totient is φ = 15064465372.

The previous prime is 15066111653. The next prime is 15066111673. The reversal of 15066111661 is 16611166051.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16611166051 = 47143 ⋅352357.

It is a cyclic number.

It is not a de Polignac number, because 15066111661 - 2³ = 15066111653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15066111691) 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, 809341 + ... + 827746.

It is an arithmetic number, because the mean of its divisors is an integer number (3766939488).

Almost surely, 2^15066111661 is an apocalyptic number.

It is an amenable number.

15066111661 is a deficient number, since it is larger than the sum of its proper divisors (1646291).

15066111661 is an equidigital number, since it uses as much as digits as its factorization.

15066111661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646290.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 15066111661 in words is "fifteen billion, sixty-six million, one hundred eleven thousand, six hundred sixty-one".