66273633642 has 16 divisors (see below), whose sum is σ = 135629762400. Its totient is φ = 21577462032.

The previous prime is 66273633541. The next prime is 66273633703. The reversal of 66273633642 is 24633637266.

It is a super-2 number, since 2×66273633642² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66273633591 and 66273633600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128437017 + ... + 128437532.

It is an arithmetic number, because the mean of its divisors is an integer number (8476860150).

Almost surely, 2^66273633642 is an apocalyptic number.

66273633642 is an abundant number, since it is smaller than the sum of its proper divisors (69356128758).

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

66273633642 is a wasteful number, since it uses less digits than its factorization.

66273633642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256874597.

The product of its digits is 3919104, while the sum is 48.

The spelling of 66273633642 in words is "sixty-six billion, two hundred seventy-three million, six hundred thirty-three thousand, six hundred forty-two".