18466407779427 has 12 divisors (see below), whose sum is σ = 26692366134720. Its totient is φ = 12302323438608.

The previous prime is 18466407779389. The next prime is 18466407779441. The reversal of 18466407779427 is 72497770466481.

18466407779427 is a `hidden beast` number, since 1 + 8 + 4 + 6 + 64 + 0 + 77 + 79 + 427 = 666.

It is not a de Polignac number, because 18466407779427 - 2¹² = 18466407775331 is a prime.

It is a super-3 number, since 3×18466407779427³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18466407779467) 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, 717909843 + ... + 717935564.

It is an arithmetic number, because the mean of its divisors is an integer number (2224363844560).

Almost surely, 2^{18466407779427} is an apocalyptic number.

18466407779427 is a deficient number, since it is larger than the sum of its proper divisors (8225958355293).

18466407779427 is a wasteful number, since it uses less digits than its factorization.

18466407779427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435846842 (or 1435846839 counting only the distinct ones).

The product of its (nonzero) digits is 796594176, while the sum is 72.

The spelling of 18466407779427 in words is "eighteen trillion, four hundred sixty-six billion, four hundred seven million, seven hundred seventy-nine thousand, four hundred twenty-seven".