668429435 has 16 divisors (see below), whose sum is σ = 809144640. Its totient is φ = 530073600.

The previous prime is 668429431. The next prime is 668429449. The reversal of 668429435 is 534924866.

It is not a de Polignac number, because 668429435 - 2² = 668429431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 668429435.

It is not an unprimeable number, because it can be changed into a prime (668429431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700919 + ... + 701871.

It is an arithmetic number, because the mean of its divisors is an integer number (50571540).

Almost surely, 2^668429435 is an apocalyptic number.

668429435 is a deficient number, since it is larger than the sum of its proper divisors (140715205).

668429435 is a wasteful number, since it uses less digits than its factorization.

668429435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038.

The product of its digits is 1244160, while the sum is 47.

The square root of 668429435 is about 25854.0023013846. The cubic root of 668429435 is about 874.3497470908.

The spelling of 668429435 in words is "six hundred sixty-eight million, four hundred twenty-nine thousand, four hundred thirty-five".