66873554306 has 8 divisors (see below), whose sum is σ = 108026510844. Its totient is φ = 30864717360.

The previous prime is 66873554303. The next prime is 66873554333. The reversal of 66873554306 is 60345537866.

It can be written as a sum of positive squares in 2 ways, for example, as 62620558081 + 4252996225 = 250241^2 + 65215^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66873554306² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66873554303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286029865 + ... + 1286029916.

Almost surely, 2^66873554306 is an apocalyptic number.

66873554306 is a deficient number, since it is larger than the sum of its proper divisors (41152956538).

66873554306 is a wasteful number, since it uses less digits than its factorization.

66873554306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572059796.

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 66873554306 in words is "sixty-six billion, eight hundred seventy-three million, five hundred fifty-four thousand, three hundred six".