2660821374 has 8 divisors (see below), whose sum is σ = 5321642760. Its totient is φ = 886940456.

The previous prime is 2660821349. The next prime is 2660821379. The reversal of 2660821374 is 4731280662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

2660821374 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660821379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221735109 + ... + 221735120.

It is an arithmetic number, because the mean of its divisors is an integer number (665205345).

Almost surely, 2^2660821374 is an apocalyptic number.

2660821374 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2660821374 is a wasteful number, since it uses less digits than its factorization.

2660821374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443470234.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 2660821374 is about 51583.1500976821. The cubic root of 2660821374 is about 1385.7085825808.

The spelling of 2660821374 in words is "two billion, six hundred sixty million, eight hundred twenty-one thousand, three hundred seventy-four".