1661711084 has 48 divisors (see below), whose sum is σ = 3334383360. Its totient is φ = 717224640.

The previous prime is 1661711083. The next prime is 1661711119. The reversal of 1661711084 is 4801171661.

It is a super-2 number, since 2×1661711084² = 5522567453376910112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1661711081) 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, 134762 + ... + 146574.

It is an arithmetic number, because the mean of its divisors is an integer number (69466320).

Almost surely, 2^1661711084 is an apocalyptic number.

It is an amenable number.

1661711084 is an abundant number, since it is smaller than the sum of its proper divisors (1672672276).

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

1661711084 is a wasteful number, since it uses less digits than its factorization.

1661711084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11990 (or 11988 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1661711084 is about 40764.0906190731. The cubic root of 1661711084 is about 1184.4548363222.

The spelling of 1661711084 in words is "one billion, six hundred sixty-one million, seven hundred eleven thousand, eighty-four".