66835053866 has 16 divisors (see below), whose sum is σ = 120604608960. Its totient is φ = 27136036800.

The previous prime is 66835053853. The next prime is 66835053889.

66835053866 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66835053866² (a number of 22 digits) contains 22 as substring.

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, 125629535 + ... + 125630066.

It is an arithmetic number, because the mean of its divisors is an integer number (7537788060).

Almost surely, 2^66835053866 is an apocalyptic number.

66835053866 is a deficient number, since it is larger than the sum of its proper divisors (53769555094).

66835053866 is a wasteful number, since it uses less digits than its factorization.

66835053866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251259629.

The product of its (nonzero) digits is 18662400, while the sum is 56.

The spelling of 66835053866 in words is "sixty-six billion, eight hundred thirty-five million, fifty-three thousand, eight hundred sixty-six".