669406095 has 24 divisors (see below), whose sum is σ = 1197735552. Its totient is φ = 345499200.

The previous prime is 669406013. The next prime is 669406117. The reversal of 669406095 is 590604966.

It is not a de Polignac number, because 669406095 - 2¹⁰ = 669405071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 669406095.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238536 + ... + 241325.

It is an arithmetic number, because the mean of its divisors is an integer number (49905648).

Almost surely, 2^669406095 is an apocalyptic number.

669406095 is a deficient number, since it is larger than the sum of its proper divisors (528329457).

669406095 is a wasteful number, since it uses less digits than its factorization.

669406095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479903 (or 479900 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 669406095 is about 25872.8833916902. The cubic root of 669406095 is about 874.7753850667.

Subtracting from 669406095 its reverse (590604966), we obtain a square (78801129 = 8877²).

The spelling of 669406095 in words is "six hundred sixty-nine million, four hundred six thousand, ninety-five".