66872466 has 20 divisors (see below), whose sum is σ = 149844222. Its totient is φ = 22290768.

The previous prime is 66872447. The next prime is 66872467. The reversal of 66872466 is 66427866.

It can be written as a sum of positive squares in only one way, i.e., 66341025 + 531441 = 8145^2 + 729^2 .

It is not an unprimeable number, because it can be changed into a prime (66872467) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 206235 + ... + 206558.

Almost surely, 2^66872466 is an apocalyptic number.

66872466 is an abundant number, since it is smaller than the sum of its proper divisors (82971756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66872466 is a wasteful number, since it uses less digits than its factorization.

66872466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412807 (or 412798 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 66872466 is about 8177.5586821496. The cubic root of 66872466 is about 405.8969421421.

The spelling of 66872466 in words is "sixty-six million, eight hundred seventy-two thousand, four hundred sixty-six".