66654996 has 12 divisors (see below), whose sum is σ = 155528352. Its totient is φ = 22218328.

The previous prime is 66654953. The next prime is 66655049. The reversal of 66654996 is 69945666.

66654996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777280 + ... + 2777303.

It is an arithmetic number, because the mean of its divisors is an integer number (12960696).

Almost surely, 2^66654996 is an apocalyptic number.

It is an amenable number.

66654996 is an abundant number, since it is smaller than the sum of its proper divisors (88873356).

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

66654996 is a wasteful number, since it uses less digits than its factorization.

66654996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5554590 (or 5554588 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 51.

The square root of 66654996 is about 8164.2510985393. The cubic root of 66654996 is about 405.4564705400.

The spelling of 66654996 in words is "sixty-six million, six hundred fifty-four thousand, nine hundred ninety-six".