669068427 has 4 divisors (see below), whose sum is σ = 892091240. Its totient is φ = 446045616.

The previous prime is 669068423. The next prime is 669068441. The reversal of 669068427 is 724860966.

669068427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 669068427 - 2² = 669068423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669068423) 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, 111511402 + ... + 111511407.

It is an arithmetic number, because the mean of its divisors is an integer number (223022810).

Almost surely, 2^669068427 is an apocalyptic number.

669068427 is a deficient number, since it is larger than the sum of its proper divisors (223022813).

669068427 is a wasteful number, since it uses less digits than its factorization.

669068427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223022812.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 669068427 is about 25866.3570492638. The cubic root of 669068427 is about 874.6282729039.

The spelling of 669068427 in words is "six hundred sixty-nine million, sixty-eight thousand, four hundred twenty-seven".