166420463413531 has 2 divisors, whose sum is σ = 166420463413532. Its totient is φ = 166420463413530.

The previous prime is 166420463413517. The next prime is 166420463413537. The reversal of 166420463413531 is 135314364024661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166420463413531 - 2⁷ = 166420463413403 is a prime.

It is a super-2 number, since 2×166420463413531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166420463413537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83210231706765 + 83210231706766.

It is an arithmetic number, because the mean of its divisors is an integer number (83210231706766).

Almost surely, 2^{166420463413531} is an apocalyptic number.

166420463413531 is a deficient number, since it is larger than the sum of its proper divisors (1).

166420463413531 is an equidigital number, since it uses as much as digits as its factorization.

166420463413531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 166420463413531 in words is "one hundred sixty-six trillion, four hundred twenty billion, four hundred sixty-three million, four hundred thirteen thousand, five hundred thirty-one".