706321221761 has 4 divisors (see below), whose sum is σ = 715261996800. Its totient is φ = 697380446724.

The previous prime is 706321221743. The next prime is 706321221763. The reversal of 706321221761 is 167122123607.

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, and also an emirpimes, since its reverse is a distinct semiprime: 167122123607 = 73 ⋅2289344159.

It is a cyclic number.

It is not a de Polignac number, because 706321221761 - 2³⁸ = 431443314817 is a prime.

It is a super-2 number, since 2×706321221761² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (706321221763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4470387401 + ... + 4470387558.

It is an arithmetic number, because the mean of its divisors is an integer number (178815499200).

Almost surely, 2^706321221761 is an apocalyptic number.

It is an amenable number.

706321221761 is a deficient number, since it is larger than the sum of its proper divisors (8940775039).

706321221761 is an equidigital number, since it uses as much as digits as its factorization.

706321221761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8940775038.

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 706321221761 in words is "seven hundred six billion, three hundred twenty-one million, two hundred twenty-one thousand, seven hundred sixty-one".