3166721670 has 128 divisors (see below), whose sum is σ = 9035136000. Its totient is φ = 695278080.

The previous prime is 3166721669. The next prime is 3166721681. The reversal of 3166721670 is 761276613.

It is a super-2 number, since 2×3166721670² = 20056252270495177800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 547956 + ... + 553704.

It is an arithmetic number, because the mean of its divisors is an integer number (70587000).

Almost surely, 2^3166721670 is an apocalyptic number.

3166721670 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3166721670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4517568000).

3166721670 is an abundant number, since it is smaller than the sum of its proper divisors (5868414330).

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

3166721670 is a wasteful number, since it uses less digits than its factorization.

3166721670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5870.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 3166721670 is about 56273.6321024332. The cubic root of 3166721670 is about 1468.4865213326.

The spelling of 3166721670 in words is "three billion, one hundred sixty-six million, seven hundred twenty-one thousand, six hundred seventy".