266628625 has 8 divisors (see below), whose sum is σ = 332752680. Its totient is φ = 213302800.

The previous prime is 266628601. The next prime is 266628647. The reversal of 266628625 is 526826662.

It can be written as a sum of positive squares in 4 ways, for example, as 16451136 + 250177489 = 4056^2 + 15817^2 .

It is not a de Polignac number, because 266628625 - 2¹³ = 266620433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1066390 + ... + 1066639.

It is an arithmetic number, because the mean of its divisors is an integer number (41594085).

Almost surely, 2^266628625 is an apocalyptic number.

266628625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266628625 is a deficient number, since it is larger than the sum of its proper divisors (66124055).

266628625 is an equidigital number, since it uses as much as digits as its factorization.

266628625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133044 (or 2133034 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 266628625 is about 16328.7667936069. The cubic root of 266628625 is about 643.6289809271.

The spelling of 266628625 in words is "two hundred sixty-six million, six hundred twenty-eight thousand, six hundred twenty-five".