2146641660 has 72 divisors (see below), whose sum is σ = 6854200080. Its totient is φ = 542308608.

The previous prime is 2146641647. The next prime is 2146641661. The reversal of 2146641660 is 661466412.

2146641660 is a `hidden beast` number, since 2 + 1 + 4 + 6 + 641 + 6 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2146641661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310417 + ... + 317256.

Almost surely, 2^2146641660 is an apocalyptic number.

2146641660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2146641660 is an abundant number, since it is smaller than the sum of its proper divisors (4707558420).

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

2146641660 is a wasteful number, since it uses less digits than its factorization.

2146641660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627707 (or 627702 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 2146641660 is about 46331.8644131660. The cubic root of 2146641660 is about 1289.9905173271.

The spelling of 2146641660 in words is "two billion, one hundred forty-six million, six hundred forty-one thousand, six hundred sixty".