1646470660 has 12 divisors (see below), whose sum is σ = 3457588428. Its totient is φ = 658588256.

The previous prime is 1646470633. The next prime is 1646470673. The reversal of 1646470660 is 660746461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1012639684 + 633830976 = 31822^2 + 25176^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41161747 + ... + 41161786.

It is an arithmetic number, because the mean of its divisors is an integer number (288132369).

Almost surely, 2^1646470660 is an apocalyptic number.

1646470660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1646470660 is an abundant number, since it is smaller than the sum of its proper divisors (1811117768).

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

1646470660 is a wasteful number, since it uses less digits than its factorization.

1646470660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82323542 (or 82323540 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 1646470660 is about 40576.7255948530. The cubic root of 1646470660 is about 1180.8226237409.

The spelling of 1646470660 in words is "one billion, six hundred forty-six million, four hundred seventy thousand, six hundred sixty".