668629005 has 32 divisors (see below), whose sum is σ = 1186859520. Its totient is φ = 318684480.

The previous prime is 668628977. The next prime is 668629033. The reversal of 668629005 is 500926866.

It is an interprime number because it is at equal distance from previous prime (668628977) and next prime (668629033).

It is not a de Polignac number, because 668629005 - 2⁶ = 668628941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24607 + ... + 44076.

It is an arithmetic number, because the mean of its divisors is an integer number (37089360).

Almost surely, 2^668629005 is an apocalyptic number.

It is an amenable number.

668629005 is a deficient number, since it is larger than the sum of its proper divisors (518230515).

668629005 is a wasteful number, since it uses less digits than its factorization.

668629005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68761.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 668629005 is about 25857.8615705166. The cubic root of 668629005 is about 874.4367553357.

The spelling of 668629005 in words is "six hundred sixty-eight million, six hundred twenty-nine thousand, five".