668001416 has 8 divisors (see below), whose sum is σ = 1252502670. Its totient is φ = 334000704.

The previous prime is 668001401. The next prime is 668001437. The reversal of 668001416 is 614100866.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 588256516 + 79744900 = 24254^2 + 8930^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41750081 + ... + 41750096.

Almost surely, 2^668001416 is an apocalyptic number.

It is an amenable number.

668001416 is a deficient number, since it is larger than the sum of its proper divisors (584501254).

668001416 is a wasteful number, since it uses less digits than its factorization.

668001416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83500183 (or 83500179 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 668001416 is about 25845.7233599681. The cubic root of 668001416 is about 874.1630815569.

The spelling of 668001416 in words is "six hundred sixty-eight million, one thousand, four hundred sixteen".