2661581214 has 32 divisors (see below), whose sum is σ = 6014880000. Its totient is φ = 872155512.

The previous prime is 2661581213. The next prime is 2661581233. The reversal of 2661581214 is 4121851662.

It is a happy number.

2661581214 is a `hidden beast` number, since 2 + 6 + 61 + 581 + 2 + 14 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661581213) 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, 414514 + ... + 420885.

It is an arithmetic number, because the mean of its divisors is an integer number (187965000).

Almost surely, 2^2661581214 is an apocalyptic number.

2661581214 is an abundant number, since it is smaller than the sum of its proper divisors (3353298786).

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

2661581214 is a wasteful number, since it uses less digits than its factorization.

2661581214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835469 (or 835463 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 2661581214 is about 51590.5147677361. The cubic root of 2661581214 is about 1385.8404737592.

The spelling of 2661581214 in words is "two billion, six hundred sixty-one million, five hundred eighty-one thousand, two hundred fourteen".