66233773217878 has 32 divisors (see below), whose sum is σ = 120223111002624. Its totient is φ = 26716040748672.

The previous prime is 66233773217869. The next prime is 66233773217947. The reversal of 66233773217878 is 87871237733266.

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, 103779975 + ... + 104416237.

It is an arithmetic number, because the mean of its divisors is an integer number (3756972218832).

Almost surely, 2^{66233773217878} is an apocalyptic number.

66233773217878 is a deficient number, since it is larger than the sum of its proper divisors (53989337784746).

66233773217878 is a wasteful number, since it uses less digits than its factorization.

66233773217878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073676.

The product of its digits is 597445632, while the sum is 70.

The spelling of 66233773217878 in words is "sixty-six trillion, two hundred thirty-three billion, seven hundred seventy-three million, two hundred seventeen thousand, eight hundred seventy-eight".