660434 has 4 divisors (see below), whose sum is σ = 990654. Its totient is φ = 330216.

The previous prime is 660409. The next prime is 660449. The reversal of 660434 is 434066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434066 = 2 ⋅217033.

It can be written as a sum of positive squares in only one way, i.e., 644809 + 15625 = 803^2 + 125^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165107 + ... + 165110.

2⁶⁶⁰⁴³⁴ is an apocalyptic number.

660434 is a deficient number, since it is larger than the sum of its proper divisors (330220).

660434 is a wasteful number, since it uses less digits than its factorization.

660434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330219.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 660434 is about 812.6709051024. The cubic root of 660434 is about 87.0849568668.

The spelling of 660434 in words is "six hundred sixty thousand, four hundred thirty-four".