66654445 has 48 divisors (see below), whose sum is σ = 96764544. Its totient is φ = 43680000.

The previous prime is 66654421. The next prime is 66654487. The reversal of 66654445 is 54445666.

It is not a de Polignac number, because 66654445 - 2⁷ = 66654317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66654398 and 66654407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 659895 + ... + 659995.

It is an arithmetic number, because the mean of its divisors is an integer number (2015928).

Almost surely, 2^66654445 is an apocalyptic number.

66654445 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66654445 is a deficient number, since it is larger than the sum of its proper divisors (30110099).

66654445 is a wasteful number, since it uses less digits than its factorization.

66654445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 201 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

The square root of 66654445 is about 8164.2173537945. The cubic root of 66654445 is about 405.4553533088.

The spelling of 66654445 in words is "sixty-six million, six hundred fifty-four thousand, four hundred forty-five".