6662715261 has 4 divisors (see below), whose sum is σ = 8883620352. Its totient is φ = 4441810172.

The previous prime is 6662715251. The next prime is 6662715263. The reversal of 6662715261 is 1625172666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6662715261 - 2⁶ = 6662715197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6662715263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110452541 + ... + 1110452546.

It is an arithmetic number, because the mean of its divisors is an integer number (2220905088).

Almost surely, 2^6662715261 is an apocalyptic number.

It is an amenable number.

6662715261 is a deficient number, since it is larger than the sum of its proper divisors (2220905091).

6662715261 is a wasteful number, since it uses less digits than its factorization.

6662715261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220905090.

The product of its digits is 181440, while the sum is 42.

The square root of 6662715261 is about 81625.4571870810. The cubic root of 6662715261 is about 1881.7001427633.

The spelling of 6662715261 in words is "six billion, six hundred sixty-two million, seven hundred fifteen thousand, two hundred sixty-one".