66883667487838 has 32 divisors (see below), whose sum is σ = 106098793839360. Its totient is φ = 31570421760000.

The previous prime is 66883667487823. The next prime is 66883667487859. The reversal of 66883667487838 is 83878476638866.

It is a congruent number.

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, 23035498 + ... + 25775986.

It is an arithmetic number, because the mean of its divisors is an integer number (3315587307480).

Almost surely, 2^{66883667487838} is an apocalyptic number.

66883667487838 is a deficient number, since it is larger than the sum of its proper divisors (39215126351522).

66883667487838 is a wasteful number, since it uses less digits than its factorization.

66883667487838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750164.

The product of its digits is 74912366592, while the sum is 88.

The spelling of 66883667487838 in words is "sixty-six trillion, eight hundred eighty-three billion, six hundred sixty-seven million, four hundred eighty-seven thousand, eight hundred thirty-eight".