666429469 has 8 divisors (see below), whose sum is σ = 671752800. Its totient is φ = 661117776.

The previous prime is 666429451. The next prime is 666429481. The reversal of 666429469 is 964924666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666429469 - 2⁷ = 666429341 is a prime.

It is a super-2 number, since 2×666429469² = 888256474303243922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666429409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138742 + ... + 143464.

It is an arithmetic number, because the mean of its divisors is an integer number (83969100).

Almost surely, 2^666429469 is an apocalyptic number.

It is an amenable number.

666429469 is a deficient number, since it is larger than the sum of its proper divisors (5323331).

666429469 is a wasteful number, since it uses less digits than its factorization.

666429469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5819.

The product of its digits is 3359232, while the sum is 52.

The square root of 666429469 is about 25815.2952530084. The cubic root of 666429469 is about 873.4768468224.

The spelling of 666429469 in words is "six hundred sixty-six million, four hundred twenty-nine thousand, four hundred sixty-nine".