2606365021 has 16 divisors (see below), whose sum is σ = 2899886080. Its totient is φ = 2326268160.

The previous prime is 2606365019. The next prime is 2606365031. The reversal of 2606365021 is 1205636062.

It is a 8-Lehmer number, since φ(2606365021) divides (2606365021-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 2606365021 - 2¹ = 2606365019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2606365031) 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, 668245 + ... + 672133.

It is an arithmetic number, because the mean of its divisors is an integer number (181242880).

Almost surely, 2^2606365021 is an apocalyptic number.

It is an amenable number.

2606365021 is a deficient number, since it is larger than the sum of its proper divisors (293521059).

2606365021 is a wasteful number, since it uses less digits than its factorization.

2606365021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5596.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 2606365021 is about 51052.5711497472. The cubic root of 2606365021 is about 1376.1900478118.

The spelling of 2606365021 in words is "two billion, six hundred six million, three hundred sixty-five thousand, twenty-one".