669628895 has 48 divisors (see below), whose sum is σ = 941777760. Its totient is φ = 454035456.

The previous prime is 669628873. The next prime is 669628907. The reversal of 669628895 is 598826966.

It is not a de Polignac number, because 669628895 - 2¹⁴ = 669612511 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 807341 + ... + 808169.

It is an arithmetic number, because the mean of its divisors is an integer number (19620370).

Almost surely, 2^669628895 is an apocalyptic number.

669628895 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

669628895 is a deficient number, since it is larger than the sum of its proper divisors (272148865).

669628895 is a wasteful number, since it uses less digits than its factorization.

669628895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 907 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 59.

The square root of 669628895 is about 25877.1886997023. The cubic root of 669628895 is about 874.8724254822.

It can be divided in two parts, 66962 and 8895, that added together give a palindrome (75857).

The spelling of 669628895 in words is "six hundred sixty-nine million, six hundred twenty-eight thousand, eight hundred ninety-five".