66757345 has 8 divisors (see below), whose sum is σ = 80172864. Its totient is φ = 53363184.

The previous prime is 66757337. The next prime is 66757357. The reversal of 66757345 is 54375766.

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

It is a cyclic number.

It is not a de Polignac number, because 66757345 - 2³ = 66757337 is a prime.

It is a super-2 number, since 2×66757345² = 8913086222898050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2622 + ... + 11848.

It is an arithmetic number, because the mean of its divisors is an integer number (10021608).

Almost surely, 2^66757345 is an apocalyptic number.

It is an amenable number.

66757345 is a deficient number, since it is larger than the sum of its proper divisors (13415519).

66757345 is a wasteful number, since it uses less digits than its factorization.

66757345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10679.

The product of its digits is 529200, while the sum is 43.

The square root of 66757345 is about 8170.5168135192. The cubic root of 66757345 is about 405.6638910624.

The spelling of 66757345 in words is "sixty-six million, seven hundred fifty-seven thousand, three hundred forty-five".