66541853 has 12 divisors (see below), whose sum is σ = 77543712. Its totient is φ = 56934360.

The previous prime is 66541831. The next prime is 66541879. The reversal of 66541853 is 35814566.

It is a de Polignac number, because none of the positive numbers 2^k-66541853 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 (66541823) 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 11 ways as a sum of consecutive naturals, for example, 42698 + ... + 44228.

It is an arithmetic number, because the mean of its divisors is an integer number (6461976).

Almost surely, 2^66541853 is an apocalyptic number.

It is an amenable number.

66541853 is a deficient number, since it is larger than the sum of its proper divisors (11001859).

66541853 is a wasteful number, since it uses less digits than its factorization.

66541853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432 (or 2425 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 66541853 is about 8157.3189835877. The cubic root of 66541853 is about 405.2269276441.

The spelling of 66541853 in words is "sixty-six million, five hundred forty-one thousand, eight hundred fifty-three".