665276725 has 24 divisors (see below), whose sum is σ = 911459520. Its totient is φ = 479128320.

The previous prime is 665276719. The next prime is 665276749. The reversal of 665276725 is 527672566.

It is not a de Polignac number, because 665276725 - 2¹¹ = 665274677 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

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, 24255 + ... + 43804.

It is an arithmetic number, because the mean of its divisors is an integer number (37977480).

Almost surely, 2^665276725 is an apocalyptic number.

It is an amenable number.

665276725 is a deficient number, since it is larger than the sum of its proper divisors (246182795).

665276725 is a wasteful number, since it uses less digits than its factorization.

665276725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68109 (or 68104 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 46.

The square root of 665276725 is about 25792.9588260052. The cubic root of 665276725 is about 872.9729293776.

The spelling of 665276725 in words is "six hundred sixty-five million, two hundred seventy-six thousand, seven hundred twenty-five".