66355849 has 12 divisors (see below), whose sum is σ = 77804544. Its totient is φ = 56423304.

The previous prime is 66355843. The next prime is 66355871. The reversal of 66355849 is 94855366.

It is not a de Polignac number, because 66355849 - 2⁹ = 66355337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66355799 and 66355808.

It is not an unprimeable number, because it can be changed into a prime (66355843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 892 + ... + 11554.

It is an arithmetic number, because the mean of its divisors is an integer number (6483712).

Almost surely, 2^66355849 is an apocalyptic number.

It is an amenable number.

66355849 is a deficient number, since it is larger than the sum of its proper divisors (11448695).

66355849 is a wasteful number, since it uses less digits than its factorization.

66355849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10804 (or 10797 counting only the distinct ones).

The product of its digits is 777600, while the sum is 46.

The square root of 66355849 is about 8145.9099553089. The cubic root of 66355849 is about 404.8489992378.

The spelling of 66355849 in words is "sixty-six million, three hundred fifty-five thousand, eight hundred forty-nine".