66220702 has 4 divisors (see below), whose sum is σ = 99331056. Its totient is φ = 33110350.

The previous prime is 66220613. The next prime is 66220711. The reversal of 66220702 is 20702266.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16555174 + ... + 16555177.

It is an arithmetic number, because the mean of its divisors is an integer number (24832764).

Almost surely, 2^66220702 is an apocalyptic number.

66220702 is a deficient number, since it is larger than the sum of its proper divisors (33110354).

66220702 is a wasteful number, since it uses less digits than its factorization.

66220702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33110353.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 66220702 is about 8137.6103371936. The cubic root of 66220702 is about 404.5739603576.

Adding to 66220702 its reverse (20702266), we get a palindrome (86922968).

The spelling of 66220702 in words is "sixty-six million, two hundred twenty thousand, seven hundred two".