1660241640 has 32 divisors (see below), whose sum is σ = 4980725280. Its totient is φ = 442731072.

The previous prime is 1660241633. The next prime is 1660241719. The reversal of 1660241640 is 461420661.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1660241598 and 1660241607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6917554 + ... + 6917793.

It is an arithmetic number, because the mean of its divisors is an integer number (155647665).

Almost surely, 2^1660241640 is an apocalyptic number.

1660241640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660241640 is an abundant number, since it is smaller than the sum of its proper divisors (3320483640).

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

1660241640 is a wasteful number, since it uses less digits than its factorization.

1660241640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13835361 (or 13835357 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1660241640 is about 40746.0628772891. The cubic root of 1660241640 is about 1184.1055972442.

The spelling of 1660241640 in words is "one billion, six hundred sixty million, two hundred forty-one thousand, six hundred forty".