66557134 has 16 divisors (see below), whose sum is σ = 114304608. Its totient is φ = 28472832.

The previous prime is 66557131. The next prime is 66557143. The reversal of 66557134 is 43175566.

It is a junction number, because it is equal to n+sod(n) for n = 66557093 and 66557102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66557131) 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 7 ways as a sum of consecutive naturals, for example, 4294 + ... + 12310.

It is an arithmetic number, because the mean of its divisors is an integer number (7144038).

Almost surely, 2^66557134 is an apocalyptic number.

66557134 is a deficient number, since it is larger than the sum of its proper divisors (47747474).

66557134 is a wasteful number, since it uses less digits than its factorization.

66557134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8619.

The product of its digits is 75600, while the sum is 37.

The square root of 66557134 is about 8158.2555733441. The cubic root of 66557134 is about 405.2579447081.

The spelling of 66557134 in words is "sixty-six million, five hundred fifty-seven thousand, one hundred thirty-four".