2659696221 has 32 divisors (see below), whose sum is σ = 4367962368. Its totient is φ = 1401845760.

The previous prime is 2659696213. The next prime is 2659696229. The reversal of 2659696221 is 1226969562.

It is an interprime number because it is at equal distance from previous prime (2659696213) and next prime (2659696229).

It is not a de Polignac number, because 2659696221 - 2³ = 2659696213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2659696229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 460411 + ... + 466151.

It is an arithmetic number, because the mean of its divisors is an integer number (136498824).

Almost surely, 2^2659696221 is an apocalyptic number.

2659696221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2659696221 is a deficient number, since it is larger than the sum of its proper divisors (1708266147).

2659696221 is a wasteful number, since it uses less digits than its factorization.

2659696221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7461.

The product of its digits is 699840, while the sum is 48.

The square root of 2659696221 is about 51572.2427377364. The cubic root of 2659696221 is about 1385.5132351340.

The spelling of 2659696221 in words is "two billion, six hundred fifty-nine million, six hundred ninety-six thousand, two hundred twenty-one".