66174471104642 has 4 divisors (see below), whose sum is σ = 99261706656966. Its totient is φ = 33087235552320.

The previous prime is 66174471104633. The next prime is 66174471104701. The reversal of 66174471104642 is 24640117447166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46287054364681 + 19887416739961 = 6803459^2 + 4459531^2 .

It is a super-3 number, since 3×66174471104642³ (a number of 42 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16543617776159 + ... + 16543617776162.

Almost surely, 2^{66174471104642} is an apocalyptic number.

66174471104642 is a deficient number, since it is larger than the sum of its proper divisors (33087235552324).

66174471104642 is a wasteful number, since it uses less digits than its factorization.

66174471104642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33087235552323.

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 66174471104642 in words is "sixty-six trillion, one hundred seventy-four billion, four hundred seventy-one million, one hundred four thousand, six hundred forty-two".