166023416323651 has 2 divisors, whose sum is σ = 166023416323652. Its totient is φ = 166023416323650.

The previous prime is 166023416323573. The next prime is 166023416323781. The reversal of 166023416323651 is 156323614320661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166023416323651 - 2³⁵ = 165989056585283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166023416323595 and 166023416323604.

It is not a weakly prime, because it can be changed into another prime (166023416323951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83011708161825 + 83011708161826.

It is an arithmetic number, because the mean of its divisors is an integer number (83011708161826).

Almost surely, 2^{166023416323651} is an apocalyptic number.

166023416323651 is a deficient number, since it is larger than the sum of its proper divisors (1).

166023416323651 is an equidigital number, since it uses as much as digits as its factorization.

166023416323651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 49.

The spelling of 166023416323651 in words is "one hundred sixty-six trillion, twenty-three billion, four hundred sixteen million, three hundred twenty-three thousand, six hundred fifty-one".