66555364 has 24 divisors (see below), whose sum is σ = 118512576. Its totient is φ = 32700000.

The previous prime is 66555311. The next prime is 66555371. The reversal of 66555364 is 46355566.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 60459 + ... + 61549.

It is an arithmetic number, because the mean of its divisors is an integer number (4938024).

Almost surely, 2^66555364 is an apocalyptic number.

It is an amenable number.

66555364 is a deficient number, since it is larger than the sum of its proper divisors (51957212).

66555364 is a wasteful number, since it uses less digits than its factorization.

66555364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1345 counting only the distinct ones).

The product of its digits is 324000, while the sum is 40.

The square root of 66555364 is about 8158.1470935501. The cubic root of 66555364 is about 405.2543522411.

The spelling of 66555364 in words is "sixty-six million, five hundred fifty-five thousand, three hundred sixty-four".