66509483 has 4 divisors (see below), whose sum is σ = 66529440. Its totient is φ = 66489528.

The previous prime is 66509467. The next prime is 66509489. The reversal of 66509483 is 38490566.

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 66509483 - 2⁴ = 66509467 is a prime.

It is a super-2 number, since 2×66509483² = 8847022657854578, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66509483.

It is not an unprimeable number, because it can be changed into a prime (66509489) 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, 3635 + ... + 12092.

It is an arithmetic number, because the mean of its divisors is an integer number (16632360).

Almost surely, 2^66509483 is an apocalyptic number.

66509483 is a deficient number, since it is larger than the sum of its proper divisors (19957).

66509483 is a wasteful number, since it uses less digits than its factorization.

66509483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19956.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 66509483 is about 8155.3346344586. The cubic root of 66509483 is about 405.1612079873.

The spelling of 66509483 in words is "sixty-six million, five hundred nine thousand, four hundred eighty-three".