7241271661 has 8 divisors (see below), whose sum is σ = 7821437624. Its totient is φ = 6664412160.

The previous prime is 7241271643. The next prime is 7241271683. The reversal of 7241271661 is 1661721427.

It can be written as a sum of positive squares in 4 ways, for example, as 1203049225 + 6038222436 = 34685^2 + 77706^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7241271661 - 2¹⁷ = 7241140589 is a prime.

It is a super-3 number, since 3×7241271661³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7241271661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7241271641) 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 7 ways as a sum of consecutive naturals, for example, 822060 + ... + 830821.

It is an arithmetic number, because the mean of its divisors is an integer number (977679703).

Almost surely, 2^7241271661 is an apocalyptic number.

It is an amenable number.

7241271661 is a deficient number, since it is larger than the sum of its proper divisors (580165963).

7241271661 is a wasteful number, since it uses less digits than its factorization.

7241271661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653231.

The product of its digits is 28224, while the sum is 37.

The square root of 7241271661 is about 85095.6618224454. The cubic root of 7241271661 is about 1934.6613113214.

The spelling of 7241271661 in words is "seven billion, two hundred forty-one million, two hundred seventy-one thousand, six hundred sixty-one".