668064154 has 8 divisors (see below), whose sum is σ = 1003722228. Its totient is φ = 333490080.

The previous prime is 668064151. The next prime is 668064203. The reversal of 668064154 is 451460866.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 667033929 + 1030225 = 25827^2 + 1015^2 .

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

It is not an unprimeable number, because it can be changed into a prime (668064151) 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 3 ways as a sum of consecutive naturals, for example, 269457 + ... + 271924.

Almost surely, 2^668064154 is an apocalyptic number.

668064154 is a deficient number, since it is larger than the sum of its proper divisors (335658074).

668064154 is a wasteful number, since it uses less digits than its factorization.

668064154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542000.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 668064154 is about 25846.9370332347. The cubic root of 668064154 is about 874.1904475301.

The spelling of 668064154 in words is "six hundred sixty-eight million, sixty-four thousand, one hundred fifty-four".