2660466653 has 4 divisors (see below), whose sum is σ = 2865117948. Its totient is φ = 2455815360.

The previous prime is 2660466643. The next prime is 2660466661. The reversal of 2660466653 is 3566640662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1545040249 + 1115426404 = 39307^2 + 33398^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660466653 - 2⁴ = 2660466637 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 (2660466643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102325628 + ... + 102325653.

It is an arithmetic number, because the mean of its divisors is an integer number (716279487).

Almost surely, 2^2660466653 is an apocalyptic number.

It is an amenable number.

2660466653 is a deficient number, since it is larger than the sum of its proper divisors (204651295).

2660466653 is a wasteful number, since it uses less digits than its factorization.

2660466653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204651294.

The product of its (nonzero) digits is 933120, while the sum is 44.

The square root of 2660466653 is about 51579.7116413033. The cubic root of 2660466653 is about 1385.6470023756.

The spelling of 2660466653 in words is "two billion, six hundred sixty million, four hundred sixty-six thousand, six hundred fifty-three".