31660064 has 12 divisors (see below), whose sum is σ = 62330814. Its totient is φ = 15830016.

The previous prime is 31660063. The next prime is 31660127. The reversal of 31660064 is 46006613.

It can be written as a sum of positive squares in only one way, i.e., 23931664 + 7728400 = 4892^2 + 2780^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31660063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494657 + ... + 494720.

Almost surely, 2^31660064 is an apocalyptic number.

It is an amenable number.

31660064 is a deficient number, since it is larger than the sum of its proper divisors (30670750).

31660064 is an equidigital number, since it uses as much as digits as its factorization.

31660064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989387 (or 989379 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 31660064 is about 5626.7276457991. The cubic root of 31660064 is about 316.3520085246.

Adding to 31660064 its reverse (46006613), we get a palindrome (77666677).

The spelling of 31660064 in words is "thirty-one million, six hundred sixty thousand, sixty-four".