7725665 has 8 divisors (see below), whose sum is σ = 9570048. Its totient is φ = 5981040.

The previous prime is 7725659. The next prime is 7725689. The reversal of 7725665 is 5665277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7725665 - 2⁴ = 7725649 is a prime.

It is a super-3 number, since 3×7725665³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

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, 24767 + ... + 25076.

It is an arithmetic number, because the mean of its divisors is an integer number (1196256).

Almost surely, 2^7725665 is an apocalyptic number.

It is an amenable number.

7725665 is a deficient number, since it is larger than the sum of its proper divisors (1844383).

7725665 is a wasteful number, since it uses less digits than its factorization.

7725665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49879.

The product of its digits is 88200, while the sum is 38.

The square root of 7725665 is about 2779.5080499973. The cubic root of 7725665 is about 197.6872336484.

The spelling of 7725665 in words is "seven million, seven hundred twenty-five thousand, six hundred sixty-five".