15666055506051 has 8 divisors (see below), whose sum is σ = 20900912412864. Its totient is φ = 10437617801640.

The previous prime is 15666055506043. The next prime is 15666055506067. The reversal of 15666055506051 is 15060555066651.

15666055506051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15666055506051 - 2³ = 15666055506043 is a prime.

It is a super-2 number, since 2×15666055506051² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15666055505985 and 15666055506003.

It is not an unprimeable number, because it can be changed into a prime (15666055506011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1604794905 + ... + 1604804666.

It is an arithmetic number, because the mean of its divisors is an integer number (2612614051608).

Almost surely, 2^{15666055506051} is an apocalyptic number.

15666055506051 is a deficient number, since it is larger than the sum of its proper divisors (5234856906813).

15666055506051 is a wasteful number, since it uses less digits than its factorization.

15666055506051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209601201.

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 15666055506051 in words is "fifteen trillion, six hundred sixty-six billion, fifty-five million, five hundred six thousand, fifty-one".