668051029 has 4 divisors (see below), whose sum is σ = 672475360. Its totient is φ = 663626700.

The previous prime is 668051003. The next prime is 668051051. The reversal of 668051029 is 920150866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 668051029 - 2¹⁵ = 668018261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668051129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2211939 + ... + 2212240.

It is an arithmetic number, because the mean of its divisors is an integer number (168118840).

Almost surely, 2^668051029 is an apocalyptic number.

It is an amenable number.

668051029 is a deficient number, since it is larger than the sum of its proper divisors (4424331).

668051029 is a wasteful number, since it uses less digits than its factorization.

668051029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424330.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 668051029 is about 25846.6831334313. The cubic root of 668051029 is about 874.1847226184.

The spelling of 668051029 in words is "six hundred sixty-eight million, fifty-one thousand, twenty-nine".