66546316155 has 48 divisors (see below), whose sum is σ = 117285622272. Its totient is φ = 32195380800.

The previous prime is 66546316127. The next prime is 66546316159. The reversal of 66546316155 is 55161364566.

It is not a de Polignac number, because 66546316155 - 2⁷ = 66546316027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66546316159) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 808350 + ... + 886860.

It is an arithmetic number, because the mean of its divisors is an integer number (2443450464).

Almost surely, 2^66546316155 is an apocalyptic number.

66546316155 is a deficient number, since it is larger than the sum of its proper divisors (50739306117).

66546316155 is a wasteful number, since it uses less digits than its factorization.

66546316155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79008 (or 78997 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 48.

The spelling of 66546316155 in words is "sixty-six billion, five hundred forty-six million, three hundred sixteen thousand, one hundred fifty-five".