66455385 has 32 divisors (see below), whose sum is σ = 110643840. Its totient is φ = 34019328.

The previous prime is 66455371. The next prime is 66455387. The reversal of 66455385 is 58355466.

It is a happy number.

It is not a de Polignac number, because 66455385 - 2¹¹ = 66453337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66455387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98409 + ... + 99081.

It is an arithmetic number, because the mean of its divisors is an integer number (3457620).

Almost surely, 2^66455385 is an apocalyptic number.

It is an amenable number.

66455385 is a deficient number, since it is larger than the sum of its proper divisors (44188455).

66455385 is a wasteful number, since it uses less digits than its factorization.

66455385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937.

The product of its digits is 432000, while the sum is 42.

The square root of 66455385 is about 8152.0172350161. The cubic root of 66455385 is about 405.0513271330.

The spelling of 66455385 in words is "sixty-six million, four hundred fifty-five thousand, three hundred eighty-five".