1669698560 has 44 divisors (see below), whose sum is σ = 4005332148. Its totient is φ = 667877376.

The previous prime is 1669698553. The next prime is 1669698599. The reversal of 1669698560 is 658969661.

It can be written as a sum of positive squares in 2 ways, for example, as 1163628544 + 506070016 = 34112^2 + 22496^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1669698496 and 1669698505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157937 + ... + 168176.

Almost surely, 2^1669698560 is an apocalyptic number.

1669698560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1669698560 is an abundant number, since it is smaller than the sum of its proper divisors (2335633588).

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

1669698560 is an equidigital number, since it uses as much as digits as its factorization.

1669698560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326138 (or 326120 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 56.

The square root of 1669698560 is about 40861.9451323600. The cubic root of 1669698560 is about 1186.3496073925.

The spelling of 1669698560 in words is "one billion, six hundred sixty-nine million, six hundred ninety-eight thousand, five hundred sixty".