7666425 has 36 divisors (see below), whose sum is σ = 14793324. Its totient is φ = 3772800.

The previous prime is 7666423. The next prime is 7666433. The reversal of 7666425 is 5246667.

It can be written as a sum of positive squares in 6 ways, for example, as 197136 + 7469289 = 444^2 + 2733^2 .

It is not a de Polignac number, because 7666425 - 2¹ = 7666423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7666425.

It is not an unprimeable number, because it can be changed into a prime (7666423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1615 + ... + 4235.

Almost surely, 2^7666425 is an apocalyptic number.

7666425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7666425 is a deficient number, since it is larger than the sum of its proper divisors (7126899).

7666425 is a wasteful number, since it uses less digits than its factorization.

7666425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650 (or 2642 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 7666425 is about 2768.8309807570. The cubic root of 7666425 is about 197.1806514541.

The spelling of 7666425 in words is "seven million, six hundred sixty-six thousand, four hundred twenty-five".