666105463 has 4 divisors (see below), whose sum is σ = 687592768. Its totient is φ = 644618160.

The previous prime is 666105449. The next prime is 666105467. The reversal of 666105463 is 364501666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364501666 = 2 ⋅182250833.

It is a cyclic number.

It is not a de Polignac number, because 666105463 - 2²⁹ = 129234551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666105467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10743606 + ... + 10743667.

It is an arithmetic number, because the mean of its divisors is an integer number (171898192).

Almost surely, 2^666105463 is an apocalyptic number.

666105463 is a deficient number, since it is larger than the sum of its proper divisors (21487305).

666105463 is a wasteful number, since it uses less digits than its factorization.

666105463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21487304.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 666105463 is about 25809.0190243643. The cubic root of 666105463 is about 873.3352676407.

The spelling of 666105463 in words is "six hundred sixty-six million, one hundred five thousand, four hundred sixty-three".