1660870896 has 80 divisors (see below), whose sum is σ = 4571207424. Its totient is φ = 517819392.

The previous prime is 1660870889. The next prime is 1660870909. The reversal of 1660870896 is 6980780661.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 126765 + ... + 139251.

Almost surely, 2^1660870896 is an apocalyptic number.

1660870896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660870896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2285603712).

1660870896 is an abundant number, since it is smaller than the sum of its proper divisors (2910336528).

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

1660870896 is a wasteful number, since it uses less digits than its factorization.

1660870896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12678 (or 12672 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 1660870896 is about 40753.7838243273. The cubic root of 1660870896 is about 1184.2551761606.

The spelling of 1660870896 in words is "one billion, six hundred sixty million, eight hundred seventy thousand, eight hundred ninety-six".