66620084 has 6 divisors (see below), whose sum is σ = 116585154. Its totient is φ = 33310040.

The previous prime is 66620083. The next prime is 66620087. The reversal of 66620084 is 48002666.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41319184 + 25300900 = 6428^2 + 5030^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66620084.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66620083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8327507 + ... + 8327514.

It is an arithmetic number, because the mean of its divisors is an integer number (19430859).

Almost surely, 2^66620084 is an apocalyptic number.

It is an amenable number.

66620084 is a deficient number, since it is larger than the sum of its proper divisors (49965070).

66620084 is a wasteful number, since it uses less digits than its factorization.

66620084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16655025 (or 16655023 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 66620084 is about 8162.1127166929. The cubic root of 66620084 is about 405.3856693036.

The spelling of 66620084 in words is "sixty-six million, six hundred twenty thousand, eighty-four".