66611054 has 4 divisors (see below), whose sum is σ = 99916584. Its totient is φ = 33305526.

The previous prime is 66611053. The next prime is 66611081. The reversal of 66611054 is 45011666.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66611053) 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 as a sum of consecutive naturals, namely, 16652762 + ... + 16652765.

It is an arithmetic number, because the mean of its divisors is an integer number (24979146).

Almost surely, 2^66611054 is an apocalyptic number.

66611054 is a deficient number, since it is larger than the sum of its proper divisors (33305530).

66611054 is a wasteful number, since it uses less digits than its factorization.

66611054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33305529.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 66611054 is about 8161.5595323443. The cubic root of 66611054 is about 405.3673525149.

The spelling of 66611054 in words is "sixty-six million, six hundred eleven thousand, fifty-four".