266401625 has 16 divisors (see below), whose sum is σ = 379966080. Its totient is φ = 182674800.

The previous prime is 266401621. The next prime is 266401649. The reversal of 266401625 is 526104662.

It is not a de Polignac number, because 266401625 - 2² = 266401621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266401591 and 266401600.

It is not an unprimeable number, because it can be changed into a prime (266401621) 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, 151355 + ... + 153104.

It is an arithmetic number, because the mean of its divisors is an integer number (23747880).

Almost surely, 2^266401625 is an apocalyptic number.

266401625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266401625 is a deficient number, since it is larger than the sum of its proper divisors (113564455).

266401625 is an equidigital number, since it uses as much as digits as its factorization.

266401625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304481 (or 304471 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 266401625 is about 16321.8143905633. The cubic root of 266401625 is about 643.4462732862.

The spelling of 266401625 in words is "two hundred sixty-six million, four hundred one thousand, six hundred twenty-five".