1659680410 has 16 divisors (see below), whose sum is σ = 3060289512. Its totient is φ = 647680000.

The previous prime is 1659680401. The next prime is 1659680431. The reversal of 1659680410 is 140869561.

It can be written as a sum of positive squares in 4 ways, for example, as 978000529 + 681679881 = 31273^2 + 26109^2 .

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 7 ways as a sum of consecutive naturals, for example, 2023591 + ... + 2024410.

Almost surely, 2^1659680410 is an apocalyptic number.

1659680410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1659680410 is a deficient number, since it is larger than the sum of its proper divisors (1400609102).

1659680410 is a wasteful number, since it uses less digits than its factorization.

1659680410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048049.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1659680410 is about 40739.1753721157. The cubic root of 1659680410 is about 1183.9721567328.

The spelling of 1659680410 in words is "one billion, six hundred fifty-nine million, six hundred eighty thousand, four hundred ten".