66055655 has 16 divisors (see below), whose sum is σ = 83026944. Its totient is φ = 50355360.

The previous prime is 66055643. The next prime is 66055663. The reversal of 66055655 is 55655066.

It is a happy number.

It is not a de Polignac number, because 66055655 - 2⁸ = 66055399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34370 + ... + 36240.

It is an arithmetic number, because the mean of its divisors is an integer number (5189184).

Almost surely, 2^66055655 is an apocalyptic number.

66055655 is a deficient number, since it is larger than the sum of its proper divisors (16971289).

66055655 is a wasteful number, since it uses less digits than its factorization.

66055655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206.

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 66055655 is about 8127.4630112969. The cubic root of 66055655 is about 404.2375636897.

The spelling of 66055655 in words is "sixty-six million, fifty-five thousand, six hundred fifty-five".