66551141 has 16 divisors (see below), whose sum is σ = 73156608. Its totient is φ = 60268800.

The previous prime is 66551137. The next prime is 66551207. The reversal of 66551141 is 14115566.

It is a cyclic number.

It is not a de Polignac number, because 66551141 - 2² = 66551137 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 (66551041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 154196 + ... + 154626.

It is an arithmetic number, because the mean of its divisors is an integer number (4572288).

Almost surely, 2^66551141 is an apocalyptic number.

It is an amenable number.

66551141 is a deficient number, since it is larger than the sum of its proper divisors (6605467).

66551141 is a wasteful number, since it uses less digits than its factorization.

66551141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its digits is 3600, while the sum is 29.

The square root of 66551141 is about 8157.8882684185. Note that the first 3 decimals coincide. The cubic root of 66551141 is about 405.2457808041.

The spelling of 66551141 in words is "sixty-six million, five hundred fifty-one thousand, one hundred forty-one".