66675089 has 8 divisors (see below), whose sum is σ = 74280360. Its totient is φ = 59423616.

The previous prime is 66675067. The next prime is 66675097. The reversal of 66675089 is 98057666.

It can be written as a sum of positive squares in 4 ways, for example, as 16265089 + 50410000 = 4033^2 + 7100^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66675089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66675029) 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, 88052 + ... + 88805.

It is an arithmetic number, because the mean of its divisors is an integer number (9285045).

Almost surely, 2^66675089 is an apocalyptic number.

It is an amenable number.

66675089 is a deficient number, since it is larger than the sum of its proper divisors (7605271).

66675089 is a wasteful number, since it uses less digits than its factorization.

66675089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176899.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 66675089 is about 8165.4815534664. The cubic root of 66675089 is about 405.4972077634.

The spelling of 66675089 in words is "sixty-six million, six hundred seventy-five thousand, eighty-nine".