66207702 has 64 divisors (see below), whose sum is σ = 151683840. Its totient is φ = 19084800.

The previous prime is 66207697. The next prime is 66207773. The reversal of 66207702 is 20770266.

It is a self number, because there is not a number n which added to its sum of digits gives 66207702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116074 + ... + 116642.

It is an arithmetic number, because the mean of its divisors is an integer number (2370060).

Almost surely, 2^66207702 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66207702, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75841920).

66207702 is an abundant number, since it is smaller than the sum of its proper divisors (85476138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66207702 is a wasteful number, since it uses less digits than its factorization.

66207702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 66207702 is about 8136.8115376971. The cubic root of 66207702 is about 404.5474842178.

Adding to 66207702 its reverse (20770266), we get a palindrome (86977968).

The spelling of 66207702 in words is "sixty-six million, two hundred seven thousand, seven hundred two".