669623354 has 8 divisors (see below), whose sum is σ = 1005807540. Its totient is φ = 334354176.

The previous prime is 669623351. The next prime is 669623411. The reversal of 669623354 is 453326966.

It can be written as a sum of positive squares in 2 ways, for example, as 669619129 + 4225 = 25877^2 + 65^2 .

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 (669623351) 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, 226919 + ... + 229850.

Almost surely, 2^669623354 is an apocalyptic number.

669623354 is a deficient number, since it is larger than the sum of its proper divisors (336184186).

669623354 is a wasteful number, since it uses less digits than its factorization.

669623354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457504.

The product of its digits is 699840, while the sum is 44.

The square root of 669623354 is about 25877.0816360733. The cubic root of 669623354 is about 874.8700123638.

The spelling of 669623354 in words is "six hundred sixty-nine million, six hundred twenty-three thousand, three hundred fifty-four".