1676643660 has 72 divisors (see below), whose sum is σ = 5102553456. Its totient is φ = 445633920.

The previous prime is 1676643611. The next prime is 1676643679. The reversal of 1676643660 is 663466761.

It is a super-2 number, since 2×1676643660² = 5622267925236391200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40090 + ... + 70430.

It is an arithmetic number, because the mean of its divisors is an integer number (70868798).

Almost surely, 2^1676643660 is an apocalyptic number.

1676643660 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 1676643660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2551276728).

1676643660 is an abundant number, since it is smaller than the sum of its proper divisors (3425909796).

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

1676643660 is a wasteful number, since it uses less digits than its factorization.

1676643660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30663 (or 30658 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The square root of 1676643660 is about 40946.8394384719. The cubic root of 1676643660 is about 1187.9922031254.

The spelling of 1676643660 in words is "one billion, six hundred seventy-six million, six hundred forty-three thousand, six hundred sixty".