66645350 has 72 divisors (see below), whose sum is σ = 136676520. Its totient is φ = 24105600.

The previous prime is 66645347. The next prime is 66645413. The reversal of 66645350 is 5354666.

It is a super-3 number, since 3×66645350³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66645350.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 912914 + ... + 912986.

It is an arithmetic number, because the mean of its divisors is an integer number (1898285).

Almost surely, 2^66645350 is an apocalyptic number.

66645350 is an abundant number, since it is smaller than the sum of its proper divisors (70031170).

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

66645350 is a wasteful number, since it uses less digits than its factorization.

66645350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 66645350 is about 8163.6603310035. The cubic root of 66645350 is about 405.4369110070.

The spelling of 66645350 in words is "sixty-six million, six hundred forty-five thousand, three hundred fifty".