15666351042 has 16 divisors (see below), whose sum is σ = 31422484800. Its totient is φ = 5207153232.

The previous prime is 15666351023. The next prime is 15666351049. The reversal of 15666351042 is 24015366651.

15666351042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (15666351049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3738678 + ... + 3742865.

It is an arithmetic number, because the mean of its divisors is an integer number (1963905300).

Almost surely, 2^15666351042 is an apocalyptic number.

15666351042 is an abundant number, since it is smaller than the sum of its proper divisors (15756133758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15666351042 is a wasteful number, since it uses less digits than its factorization.

15666351042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7481897.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 15666351042 in words is "fifteen billion, six hundred sixty-six million, three hundred fifty-one thousand, forty-two".