66355245 has 48 divisors (see below), whose sum is σ = 128898432. Its totient is φ = 31294080.

The previous prime is 66355217. The next prime is 66355249. The reversal of 66355245 is 54255366.

It is a happy number.

66355245 is a `hidden beast` number, since 6 + 63 + 552 + 45 = 666.

It is not a de Polignac number, because 66355245 - 2¹⁰ = 66354221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66355249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16504 + ... + 20126.

It is an arithmetic number, because the mean of its divisors is an integer number (2685384).

Almost surely, 2^66355245 is an apocalyptic number.

It is an amenable number.

66355245 is a deficient number, since it is larger than the sum of its proper divisors (62543187).

66355245 is a wasteful number, since it uses less digits than its factorization.

66355245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682 (or 3679 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 66355245 is about 8145.8728814044. The cubic root of 66355245 is about 404.8477708631.

The spelling of 66355245 in words is "sixty-six million, three hundred fifty-five thousand, two hundred forty-five".