668153737 has 8 divisors (see below), whose sum is σ = 723910176. Its totient is φ = 614225472.

The previous prime is 668153729. The next prime is 668153803. The reversal of 668153737 is 737351866.

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

It is a cyclic number.

It is not a de Polignac number, because 668153737 - 2³ = 668153729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668150737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456283 + ... + 457744.

It is an arithmetic number, because the mean of its divisors is an integer number (90488772).

Almost surely, 2^668153737 is an apocalyptic number.

It is an amenable number.

668153737 is a deficient number, since it is larger than the sum of its proper divisors (55756439).

668153737 is a wasteful number, since it uses less digits than its factorization.

668153737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914087.

The product of its digits is 635040, while the sum is 46.

The square root of 668153737 is about 25848.6699270968. The cubic root of 668153737 is about 874.2295201762.

The spelling of 668153737 in words is "six hundred sixty-eight million, one hundred fifty-three thousand, seven hundred thirty-seven".