66580545 has 8 divisors (see below), whose sum is σ = 106528896. Its totient is φ = 35509616.

The previous prime is 66580543. The next prime is 66580567. The reversal of 66580545 is 54508566.

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 66580545 - 2¹ = 66580543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66580543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2219337 + ... + 2219366.

It is an arithmetic number, because the mean of its divisors is an integer number (13316112).

Almost surely, 2^66580545 is an apocalyptic number.

It is an amenable number.

66580545 is a deficient number, since it is larger than the sum of its proper divisors (39948351).

66580545 is a wasteful number, since it uses less digits than its factorization.

66580545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4438711.

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 66580545 is about 8159.6902514740. The cubic root of 66580545 is about 405.3054546744.

The spelling of 66580545 in words is "sixty-six million, five hundred eighty thousand, five hundred forty-five".