70221716661 has 8 divisors (see below), whose sum is σ = 94257338400. Its totient is φ = 46500286352.

The previous prime is 70221716639. The next prime is 70221716683. The reversal of 70221716661 is 16661712207.

It is an interprime number because it is at equal distance from previous prime (70221716639) and next prime (70221716683).

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 70221716661 - 2¹⁰ = 70221715637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70221706661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78547335 + ... + 78548228.

It is an arithmetic number, because the mean of its divisors is an integer number (11782167300).

Almost surely, 2^70221716661 is an apocalyptic number.

It is an amenable number.

70221716661 is a deficient number, since it is larger than the sum of its proper divisors (24035621739).

70221716661 is a wasteful number, since it uses less digits than its factorization.

70221716661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157095715.

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 70221716661 in words is "seventy billion, two hundred twenty-one million, seven hundred sixteen thousand, six hundred sixty-one".