66072055 has 8 divisors (see below), whose sum is σ = 90613152. Its totient is φ = 45306528.

The previous prime is 66072053. The next prime is 66072073. The reversal of 66072055 is 55027066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66072055 - 2¹ = 66072053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66072053) 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 7 ways as a sum of consecutive naturals, for example, 943852 + ... + 943921.

It is an arithmetic number, because the mean of its divisors is an integer number (11326644).

Almost surely, 2^66072055 is an apocalyptic number.

66072055 is a deficient number, since it is larger than the sum of its proper divisors (24541097).

66072055 is a wasteful number, since it uses less digits than its factorization.

66072055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887785.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 66072055 is about 8128.4718736058. The cubic root of 66072055 is about 404.2710150143.

The spelling of 66072055 in words is "sixty-six million, seventy-two thousand, fifty-five".