665403434 has 8 divisors (see below), whose sum is σ = 1032522660. Its totient is φ = 321229216.

The previous prime is 665403407. The next prime is 665403461. The reversal of 665403434 is 434304566.

It is an interprime number because it is at equal distance from previous prime (665403407) and next prime (665403461).

It can be written as a sum of positive squares in 2 ways, for example, as 646939225 + 18464209 = 25435^2 + 4297^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 665403394 and 665403403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5736179 + ... + 5736294.

Almost surely, 2^665403434 is an apocalyptic number.

665403434 is a deficient number, since it is larger than the sum of its proper divisors (367119226).

665403434 is a wasteful number, since it uses less digits than its factorization.

665403434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11472504.

The product of its (nonzero) digits is 103680, while the sum is 35.

The square root of 665403434 is about 25795.4149801859. The cubic root of 665403434 is about 873.0283481735.

The spelling of 665403434 in words is "six hundred sixty-five million, four hundred three thousand, four hundred thirty-four".