66541016 has 16 divisors (see below), whose sum is σ = 125604000. Its totient is φ = 33046624.

The previous prime is 66541003. The next prime is 66541031. The reversal of 66541016 is 61014566.

It is a self number, because there is not a number n which added to its sum of digits gives 66541016.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 26720 + ... + 29103.

It is an arithmetic number, because the mean of its divisors is an integer number (7850250).

Almost surely, 2^66541016 is an apocalyptic number.

It is an amenable number.

66541016 is a deficient number, since it is larger than the sum of its proper divisors (59062984).

66541016 is a wasteful number, since it uses less digits than its factorization.

66541016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55978 (or 55974 counting only the distinct ones).

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

The square root of 66541016 is about 8157.2676798055. The cubic root of 66541016 is about 405.2252285813.

The spelling of 66541016 in words is "sixty-six million, five hundred forty-one thousand, sixteen".