66752578 has 8 divisors (see below), whose sum is σ = 104482368. Its totient is φ = 31925124.

The previous prime is 66752573. The next prime is 66752611. The reversal of 66752578 is 87525766.

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

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 1451143 = 66752578 / (6 + 6 + 7 + 5 + 2 + 5 + 7 + 8).

It is not an unprimeable number, because it can be changed into a prime (66752573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725526 + ... + 725617.

It is an arithmetic number, because the mean of its divisors is an integer number (13060296).

Almost surely, 2^66752578 is an apocalyptic number.

66752578 is a deficient number, since it is larger than the sum of its proper divisors (37729790).

66752578 is a wasteful number, since it uses less digits than its factorization.

66752578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451168.

The product of its digits is 705600, while the sum is 46.

The square root of 66752578 is about 8170.2250886986. The cubic root of 66752578 is about 405.6542349673.

The spelling of 66752578 in words is "sixty-six million, seven hundred fifty-two thousand, five hundred seventy-eight".