66542355 has 48 divisors (see below), whose sum is σ = 126696960. Its totient is φ = 32040000.

The previous prime is 66542353. The next prime is 66542393. The reversal of 66542355 is 55324566.

It is a happy number.

66542355 is a `hidden beast` number, since 66 + 542 + 3 + 55 = 666.

It is not a de Polignac number, because 66542355 - 2¹ = 66542353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66542353) 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 47 ways as a sum of consecutive naturals, for example, 88230 + ... + 88980.

It is an arithmetic number, because the mean of its divisors is an integer number (2639520).

Almost surely, 2^66542355 is an apocalyptic number.

66542355 is a deficient number, since it is larger than the sum of its proper divisors (60154605).

66542355 is a wasteful number, since it uses less digits than its factorization.

66542355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952 (or 949 counting only the distinct ones).

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

The square root of 66542355 is about 8157.3497534432. The cubic root of 66542355 is about 405.2279466690.

It can be divided in two parts, 6654 and 2355, that added together give a palindrome (9009).

The spelling of 66542355 in words is "sixty-six million, five hundred forty-two thousand, three hundred fifty-five".