66655369 has 16 divisors (see below), whose sum is σ = 75640320. Its totient is φ = 58181760.

The previous prime is 66655339. The next prime is 66655387. The reversal of 66655369 is 96355666.

66655369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66655369 - 2⁹ = 66654857 is a prime.

It is a super-2 number, since 2×66655369² = 8885876433052322, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (874800) is a multiple of the sum of its prime divisors (1200).

It is not an unprimeable number, because it can be changed into a prime (66655319) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 70669 + ... + 71605.

It is an arithmetic number, because the mean of its divisors is an integer number (4727520).

Almost surely, 2^66655369 is an apocalyptic number.

It is an amenable number.

66655369 is a deficient number, since it is larger than the sum of its proper divisors (8984951).

66655369 is a wasteful number, since it uses less digits than its factorization.

66655369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its digits is 874800, while the sum is 46.

The square root of 66655369 is about 8164.2739419988. The cubic root of 66655369 is about 405.4572268473.

The spelling of 66655369 in words is "sixty-six million, six hundred fifty-five thousand, three hundred sixty-nine".