266250621 has 16 divisors (see below), whose sum is σ = 436924544. Its totient is φ = 140439744.

The previous prime is 266250601. The next prime is 266250623. The reversal of 266250621 is 126052662.

It is not a de Polignac number, because 266250621 - 2¹⁴ = 266234237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266250623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487366 + ... + 487911.

It is an arithmetic number, because the mean of its divisors is an integer number (27307784).

Almost surely, 2^266250621 is an apocalyptic number.

266250621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

266250621 is a deficient number, since it is larger than the sum of its proper divisors (170673923).

266250621 is a wasteful number, since it uses less digits than its factorization.

266250621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975300.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 266250621 is about 16317.1879011060. The cubic root of 266250621 is about 643.3246757734.

The spelling of 266250621 in words is "two hundred sixty-six million, two hundred fifty thousand, six hundred twenty-one".