6901655221 has 8 divisors (see below), whose sum is σ = 6962918688. Its totient is φ = 6840522000.

The previous prime is 6901655191. The next prime is 6901655227. The reversal of 6901655221 is 1225561096.

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

It is a cyclic number.

It is not a de Polignac number, because 6901655221 - 2²³ = 6893266613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6901655227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75466 + ... + 139636.

It is an arithmetic number, because the mean of its divisors is an integer number (870364836).

Almost surely, 2^6901655221 is an apocalyptic number.

It is an amenable number.

6901655221 is a deficient number, since it is larger than the sum of its proper divisors (61263467).

6901655221 is a wasteful number, since it uses less digits than its factorization.

6901655221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65123.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 6901655221 is about 83076.2012913446. The cubic root of 6901655221 is about 1903.9304804086.

The spelling of 6901655221 in words is "six billion, nine hundred one million, six hundred fifty-five thousand, two hundred twenty-one".