66360220 has 12 divisors (see below), whose sum is σ = 139356504. Its totient is φ = 26544080.

The previous prime is 66360157. The next prime is 66360241. The reversal of 66360220 is 2206366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658986 + ... + 1659025.

It is an arithmetic number, because the mean of its divisors is an integer number (11613042).

Almost surely, 2^66360220 is an apocalyptic number.

It is an amenable number.

66360220 is an abundant number, since it is smaller than the sum of its proper divisors (72996284).

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

66360220 is a wasteful number, since it uses less digits than its factorization.

66360220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318020 (or 3318018 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 66360220 is about 8146.1782450423. The cubic root of 66360220 is about 404.8578884623.

Adding to 66360220 its reverse (2206366), we get a palindrome (68566586).

The spelling of 66360220 in words is "sixty-six million, three hundred sixty thousand, two hundred twenty".