42881852348666 has 4 divisors (see below), whose sum is σ = 64322778523002. Its totient is φ = 21440926174332.

The previous prime is 42881852348659. The next prime is 42881852348677. The reversal of 42881852348666 is 66684325818824.

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., 42139299607441 + 742552741225 = 6491479^2 + 861715^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42881852348666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720463087165 + ... + 10720463087168.

Almost surely, 2^{42881852348666} is an apocalyptic number.

42881852348666 is a deficient number, since it is larger than the sum of its proper divisors (21440926174336).

42881852348666 is a wasteful number, since it uses less digits than its factorization.

42881852348666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21440926174335.

The product of its digits is 849346560, while the sum is 71.

The spelling of 42881852348666 in words is "forty-two trillion, eight hundred eighty-one billion, eight hundred fifty-two million, three hundred forty-eight thousand, six hundred sixty-six".