66553274 has 8 divisors (see below), whose sum is σ = 100388160. Its totient is φ = 33090556.

The previous prime is 66553259. The next prime is 66553303. The reversal of 66553274 is 47235566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 92594 + ... + 93309.

It is an arithmetic number, because the mean of its divisors is an integer number (12548520).

Almost surely, 2^66553274 is an apocalyptic number.

66553274 is a deficient number, since it is larger than the sum of its proper divisors (33834886).

66553274 is a wasteful number, since it uses less digits than its factorization.

66553274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186084.

The product of its digits is 151200, while the sum is 38.

The square root of 66553274 is about 8158.0189997327. The cubic root of 66553274 is about 405.2501102066.

The spelling of 66553274 in words is "sixty-six million, five hundred fifty-three thousand, two hundred seventy-four".