669073349 has 4 divisors (see below), whose sum is σ = 764655264. Its totient is φ = 573491436.

The previous prime is 669073343. The next prime is 669073409. The reversal of 669073349 is 943370966.

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, and also an emirpimes, since its reverse is a distinct semiprime: 943370966 = 2 ⋅471685483.

It is not a de Polignac number, because 669073349 - 2⁴ = 669073333 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 (669073343) 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, 47790947 + ... + 47790960.

It is an arithmetic number, because the mean of its divisors is an integer number (191163816).

Almost surely, 2^669073349 is an apocalyptic number.

It is an amenable number.

669073349 is a deficient number, since it is larger than the sum of its proper divisors (95581915).

669073349 is an equidigital number, since it uses as much as digits as its factorization.

669073349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95581914.

The product of its (nonzero) digits is 734832, while the sum is 47.

The square root of 669073349 is about 25866.4521919803. The cubic root of 669073349 is about 874.6304176321.

The spelling of 669073349 in words is "six hundred sixty-nine million, seventy-three thousand, three hundred forty-nine".