166451413979 has 2 divisors, whose sum is σ = 166451413980. Its totient is φ = 166451413978.

The previous prime is 166451413969. The next prime is 166451413987. The reversal of 166451413979 is 979314154661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166451413979 is a prime.

It is a super-2 number, since 2×166451413979² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166451413939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83225706989 + 83225706990.

It is an arithmetic number, because the mean of its divisors is an integer number (83225706990).

Almost surely, 2^166451413979 is an apocalyptic number.

166451413979 is a deficient number, since it is larger than the sum of its proper divisors (1).

166451413979 is an equidigital number, since it uses as much as digits as its factorization.

166451413979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 56.

The spelling of 166451413979 in words is "one hundred sixty-six billion, four hundred fifty-one million, four hundred thirteen thousand, nine hundred seventy-nine".