669427235 has 4 divisors (see below), whose sum is σ = 803312688. Its totient is φ = 535541784.

The previous prime is 669427229. The next prime is 669427249. The reversal of 669427235 is 532724966.

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

It is a cyclic number.

It is not a de Polignac number, because 669427235 - 2⁴ = 669427219 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66942719 + ... + 66942728.

It is an arithmetic number, because the mean of its divisors is an integer number (200828172).

Almost surely, 2^669427235 is an apocalyptic number.

669427235 is a deficient number, since it is larger than the sum of its proper divisors (133885453).

669427235 is a wasteful number, since it uses less digits than its factorization.

669427235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133885452.

The product of its digits is 544320, while the sum is 44.

The square root of 669427235 is about 25873.2919242991. The cubic root of 669427235 is about 874.7845935064.

The spelling of 669427235 in words is "six hundred sixty-nine million, four hundred twenty-seven thousand, two hundred thirty-five".