1660693632 has 128 divisors (see below), whose sum is σ = 5000856000. Its totient is φ = 484061184.

The previous prime is 1660693609. The next prime is 1660693663. The reversal of 1660693632 is 2363960661.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86094 + ... + 103602.

Almost surely, 2^1660693632 is an apocalyptic number.

1660693632 is a gapful number since it is divisible by the number (12) 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 1660693632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2500428000).

1660693632 is an abundant number, since it is smaller than the sum of its proper divisors (3340162368).

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

1660693632 is a wasteful number, since it uses less digits than its factorization.

1660693632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17558 (or 17546 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 1660693632 is about 40751.6089498317. The cubic root of 1660693632 is about 1184.2130429884.

The spelling of 1660693632 in words is "one billion, six hundred sixty million, six hundred ninety-three thousand, six hundred thirty-two".