166001011621019 has 2 divisors, whose sum is σ = 166001011621020. Its totient is φ = 166001011621018.

The previous prime is 166001011621013. The next prime is 166001011621031. The reversal of 166001011621019 is 910126110100661.

It is a weak prime.

It is an emirp because it is prime and its reverse (910126110100661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166001011621019 is a prime.

It is a super-2 number, since 2×166001011621019² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166001011621019.

It is not a weakly prime, because it can be changed into another prime (166001011621013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83000505810509 + 83000505810510.

It is an arithmetic number, because the mean of its divisors is an integer number (83000505810510).

Almost surely, 2^{166001011621019} is an apocalyptic number.

166001011621019 is a deficient number, since it is larger than the sum of its proper divisors (1).

166001011621019 is an equidigital number, since it uses as much as digits as its factorization.

166001011621019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 35.

The spelling of 166001011621019 in words is "one hundred sixty-six trillion, one billion, eleven million, six hundred twenty-one thousand, nineteen".