660220701 has 16 divisors (see below), whose sum is σ = 1007766144. Its totient is φ = 376625664.

The previous prime is 660220661. The next prime is 660220763. The reversal of 660220701 is 107022066.

It is a happy number.

It is not a de Polignac number, because 660220701 - 2⁷ = 660220573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660220201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14056 + ... + 38961.

It is an arithmetic number, because the mean of its divisors is an integer number (62985384).

Almost surely, 2^660220701 is an apocalyptic number.

It is an amenable number.

660220701 is a deficient number, since it is larger than the sum of its proper divisors (347545443).

660220701 is a wasteful number, since it uses less digits than its factorization.

660220701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53620.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 660220701 is about 25694.7601856877. The cubic root of 660220701 is about 870.7558064135.

Adding to 660220701 its reverse (107022066), we get a palindrome (767242767).

The spelling of 660220701 in words is "six hundred sixty million, two hundred twenty thousand, seven hundred one".