660074147 has 4 divisors (see below), whose sum is σ = 698902056. Its totient is φ = 621246240.

The previous prime is 660074143. The next prime is 660074159. The reversal of 660074147 is 741470066.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 660074147 - 2² = 660074143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660074141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19413929 + ... + 19413962.

It is an arithmetic number, because the mean of its divisors is an integer number (174725514).

Almost surely, 2^660074147 is an apocalyptic number.

660074147 is a deficient number, since it is larger than the sum of its proper divisors (38827909).

660074147 is a wasteful number, since it uses less digits than its factorization.

660074147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38827908.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 660074147 is about 25691.9082008324. The cubic root of 660074147 is about 870.6913723085.

The spelling of 660074147 in words is "six hundred sixty million, seventy-four thousand, one hundred forty-seven".