666000473 has 2 divisors, whose sum is σ = 666000474. Its totient is φ = 666000472.

The previous prime is 666000371. The next prime is 666000479. The reversal of 666000473 is 374000666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377408329 + 288592144 = 19427^2 + 16988^2 .

It is a cyclic number.

It is not a de Polignac number, because 666000473 - 2²² = 661806169 is a prime.

It is equal to p_34581704 and since 666000473 and 34581704 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (666000479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333000236 + 333000237.

It is an arithmetic number, because the mean of its divisors is an integer number (333000237).

Almost surely, 2^666000473 is an apocalyptic number.

It is an amenable number.

666000473 is a deficient number, since it is larger than the sum of its proper divisors (1).

666000473 is an equidigital number, since it uses as much as digits as its factorization.

666000473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 666000473 is about 25806.9849653151. The cubic root of 666000473 is about 873.2893808692.

The spelling of 666000473 in words is "six hundred sixty-six million, four hundred seventy-three", and thus it is an aban number.