662242126661 has 4 divisors (see below), whose sum is σ = 662528689824. Its totient is φ = 661955563500.

The previous prime is 662242126547. The next prime is 662242126691. The reversal of 662242126661 is 166621242266.

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 662242126661 - 2²⁶ = 662175017797 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 (662242126691) 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, 143278115 + ... + 143282736.

It is an arithmetic number, because the mean of its divisors is an integer number (165632172456).

Almost surely, 2^662242126661 is an apocalyptic number.

It is an amenable number.

662242126661 is a deficient number, since it is larger than the sum of its proper divisors (286563163).

662242126661 is a wasteful number, since it uses less digits than its factorization.

662242126661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286563162.

The product of its digits is 497664, while the sum is 44.

The spelling of 662242126661 in words is "six hundred sixty-two billion, two hundred forty-two million, one hundred twenty-six thousand, six hundred sixty-one".