66422655 has 48 divisors (see below), whose sum is σ = 131302080. Its totient is φ = 30772224.

The previous prime is 66422639. The next prime is 66422683. The reversal of 66422655 is 55622466.

66422655 is a `hidden beast` number, since 6 + 642 + 2 + 6 + 5 + 5 = 666.

It is not a de Polignac number, because 66422655 - 2⁴ = 66422639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6606 + ... + 13284.

It is an arithmetic number, because the mean of its divisors is an integer number (2735460).

Almost surely, 2^66422655 is an apocalyptic number.

66422655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66422655 is a deficient number, since it is larger than the sum of its proper divisors (64879425).

66422655 is a wasteful number, since it uses less digits than its factorization.

66422655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6720 (or 6717 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 66422655 is about 8150.0095091969. The cubic root of 66422655 is about 404.9848188182.

The spelling of 66422655 in words is "sixty-six million, four hundred twenty-two thousand, six hundred fifty-five".