84429076661 has 2 divisors, whose sum is σ = 84429076662. Its totient is φ = 84429076660.

The previous prime is 84429076579. The next prime is 84429076663. The reversal of 84429076661 is 16667092448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42611280625 + 41817796036 = 206425^2 + 204494^2 .

It is a cyclic number.

It is not a de Polignac number, because 84429076661 - 2¹⁰ = 84429075637 is a prime.

Together with 84429076663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84429076663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42214538330 + 42214538331.

It is an arithmetic number, because the mean of its divisors is an integer number (42214538331).

Almost surely, 2^84429076661 is an apocalyptic number.

It is an amenable number.

84429076661 is a deficient number, since it is larger than the sum of its proper divisors (1).

84429076661 is an equidigital number, since it uses as much as digits as its factorization.

84429076661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 84429076661 in words is "eighty-four billion, four hundred twenty-nine million, seventy-six thousand, six hundred sixty-one".