66552655 has 16 divisors (see below), whose sum is σ = 86181984. Its totient is φ = 49046400.

The previous prime is 66552653. The next prime is 66552659. The reversal of 66552655 is 55625566.

It is not a de Polignac number, because 66552655 - 2¹ = 66552653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66552653) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 50505 + ... + 51805.

It is an arithmetic number, because the mean of its divisors is an integer number (5386374).

Almost surely, 2^66552655 is an apocalyptic number.

66552655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66552655 is a deficient number, since it is larger than the sum of its proper divisors (19629329).

66552655 is a wasteful number, since it uses less digits than its factorization.

66552655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106.

The product of its digits is 270000, while the sum is 40.

The square root of 66552655 is about 8157.9810615127. The cubic root of 66552655 is about 405.2488538166.

The spelling of 66552655 in words is "sixty-six million, five hundred fifty-two thousand, six hundred fifty-five".