66789561234 has 32 divisors (see below), whose sum is σ = 146364662016. Its totient is φ = 20150096720.

The previous prime is 66789561229. The next prime is 66789561263. The reversal of 66789561234 is 43216598766.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2214012 + ... + 2243975.

It is an arithmetic number, because the mean of its divisors is an integer number (4573895688).

Almost surely, 2^66789561234 is an apocalyptic number.

66789561234 is an abundant number, since it is smaller than the sum of its proper divisors (79575100782).

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

66789561234 is a wasteful number, since it uses less digits than its factorization.

66789561234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4458230.

The product of its digits is 13063680, while the sum is 57.

The spelling of 66789561234 in words is "sixty-six billion, seven hundred eighty-nine million, five hundred sixty-one thousand, two hundred thirty-four".