66146649104 has 20 divisors (see below), whose sum is σ = 128163216300. Its totient is φ = 33072270720.

The previous prime is 66146649091. The next prime is 66146649119. The reversal of 66146649104 is 40194664166.

It can be written as a sum of positive squares in 2 ways, for example, as 29497375504 + 36649273600 = 171748^2 + 191440^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785222 + ... + 865370.

It is an arithmetic number, because the mean of its divisors is an integer number (6408160815).

Almost surely, 2^66146649104 is an apocalyptic number.

It is an amenable number.

66146649104 is a deficient number, since it is larger than the sum of its proper divisors (62016567196).

66146649104 is a wasteful number, since it uses less digits than its factorization.

66146649104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131738 (or 131732 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 66146649104 in words is "sixty-six billion, one hundred forty-six million, six hundred forty-nine thousand, one hundred four".