6602121261 has 24 divisors (see below), whose sum is σ = 9616258080. Its totient is φ = 4364693856.

The previous prime is 6602121259. The next prime is 6602121293. The reversal of 6602121261 is 1621212066.

It is not a de Polignac number, because 6602121261 - 2¹ = 6602121259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6602121221) 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, 595410 + ... + 606396.

It is an arithmetic number, because the mean of its divisors is an integer number (400677420).

Almost surely, 2^6602121261 is an apocalyptic number.

It is an amenable number.

6602121261 is a deficient number, since it is larger than the sum of its proper divisors (3014136819).

6602121261 is a wasteful number, since it uses less digits than its factorization.

6602121261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11545 (or 11542 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 6602121261 is about 81253.4384564740. The cubic root of 6602121261 is about 1875.9783941218.

The spelling of 6602121261 in words is "six billion, six hundred two million, one hundred twenty-one thousand, two hundred sixty-one".