1667860660 has 48 divisors (see below), whose sum is σ = 3694521600. Its totient is φ = 630716544.

The previous prime is 1667860637. The next prime is 1667860661. The reversal of 1667860660 is 660687661.

It is a self number, because there is not a number n which added to its sum of digits gives 1667860660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667860661) 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, 189109 + ... + 197731.

It is an arithmetic number, because the mean of its divisors is an integer number (76969200).

Almost surely, 2^1667860660 is an apocalyptic number.

1667860660 is a gapful number since it is divisible by the number (10) 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 1667860660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1847260800).

1667860660 is an abundant number, since it is smaller than the sum of its proper divisors (2026660940).

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

1667860660 is a wasteful number, since it uses less digits than its factorization.

1667860660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9160 (or 9158 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 1667860660 is about 40839.4498004074. The cubic root of 1667860660 is about 1185.9141610394.

The spelling of 1667860660 in words is "one billion, six hundred sixty-seven million, eight hundred sixty thousand, six hundred sixty".