1580020660 has 12 divisors (see below), whose sum is σ = 3318043428. Its totient is φ = 632008256.

The previous prime is 1580020633. The next prime is 1580020661. The reversal of 1580020660 is 660200851.

It can be written as a sum of positive squares in 2 ways, for example, as 1254434724 + 325585936 = 35418^2 + 18044^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1580020661) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 39500497 + ... + 39500536.

It is an arithmetic number, because the mean of its divisors is an integer number (276503619).

Almost surely, 2^1580020660 is an apocalyptic number.

1580020660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1580020660 is an abundant number, since it is smaller than the sum of its proper divisors (1738022768).

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

1580020660 is a wasteful number, since it uses less digits than its factorization.

1580020660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79001042 (or 79001040 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1580020660 is about 39749.4737072077. The cubic root of 1580020660 is about 1164.7183610669.

The spelling of 1580020660 in words is "one billion, five hundred eighty million, twenty thousand, six hundred sixty".