1660635141 has 16 divisors (see below), whose sum is σ = 2429941248. Its totient is φ = 1000415600.

The previous prime is 1660635107. The next prime is 1660635143. The reversal of 1660635141 is 1415360661.

It is a cyclic number.

It is not a de Polignac number, because 1660635141 - 2⁶ = 1660635077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660635143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145155 + ... + 156176.

It is an arithmetic number, because the mean of its divisors is an integer number (151871328).

Almost surely, 2^1660635141 is an apocalyptic number.

1660635141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1660635141 is a deficient number, since it is larger than the sum of its proper divisors (769306107).

1660635141 is a wasteful number, since it uses less digits than its factorization.

1660635141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301512.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1660635141 is about 40750.8912908663. The cubic root of 1660635141 is about 1184.1991398383.

The spelling of 1660635141 in words is "one billion, six hundred sixty million, six hundred thirty-five thousand, one hundred forty-one".