1660663101 has 4 divisors (see below), whose sum is σ = 2214217472. Its totient is φ = 1107108732.

The previous prime is 1660663097. The next prime is 1660663117. The reversal of 1660663101 is 1013660661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1660663101 - 2² = 1660663097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660663141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276777181 + ... + 276777186.

It is an arithmetic number, because the mean of its divisors is an integer number (553554368).

Almost surely, 2^1660663101 is an apocalyptic number.

It is an amenable number.

1660663101 is a deficient number, since it is larger than the sum of its proper divisors (553554371).

1660663101 is an equidigital number, since it uses as much as digits as its factorization.

1660663101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553554370.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1660663101 is about 40751.2343494035. The cubic root of 1660663101 is about 1184.2057858943.

The spelling of 1660663101 in words is "one billion, six hundred sixty million, six hundred sixty-three thousand, one hundred one".