666424143 has 96 divisors (see below), whose sum is σ = 1260060672. Its totient is φ = 329313600.

The previous prime is 666424063. The next prime is 666424201. The reversal of 666424143 is 341424666.

It is not a de Polignac number, because 666424143 - 2⁸ = 666423887 is a prime.

It is a super-2 number, since 2×666424143² = 888242276746568898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 666424098 and 666424107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666424043) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1439130 + ... + 1439592.

It is an arithmetic number, because the mean of its divisors is an integer number (13125632).

Almost surely, 2^666424143 is an apocalyptic number.

666424143 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

666424143 is a deficient number, since it is larger than the sum of its proper divisors (593636529).

666424143 is a wasteful number, since it uses less digits than its factorization.

666424143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 582 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 666424143 is about 25815.1920969029. The cubic root of 666424143 is about 873.4745199195.

The spelling of 666424143 in words is "six hundred sixty-six million, four hundred twenty-four thousand, one hundred forty-three".