620000642660 has 36 divisors (see below), whose sum is σ = 1514573000892. Its totient is φ = 212571648576.

The previous prime is 620000642641. The next prime is 620000642683. The reversal of 620000642660 is 66246000026.

It can be written as a sum of positive squares in 2 ways, for example, as 152262283264 + 467738359396 = 390208^2 + 683914^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316325879 + ... + 316327838.

It is an arithmetic number, because the mean of its divisors is an integer number (42071472247).

Almost surely, 2^620000642660 is an apocalyptic number.

It is an amenable number.

620000642660 is an abundant number, since it is smaller than the sum of its proper divisors (894572358232).

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

620000642660 is a wasteful number, since it uses less digits than its factorization.

620000642660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632653740 (or 632653731 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 620000642660 its reverse (66246000026), we get a palindrome (686246642686).

The spelling of 620000642660 in words is "six hundred twenty billion, six hundred forty-two thousand, six hundred sixty".