76666025 has 6 divisors (see below), whose sum is σ = 95065902. Its totient is φ = 61332800.

The previous prime is 76666019. The next prime is 76666027. The reversal of 76666025 is 52066667.

It can be written as a sum of positive squares in 3 ways, for example, as 14776336 + 61889689 = 3844^2 + 7867^2 .

It is not a de Polignac number, because 76666025 - 2²⁶ = 9557161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 76666025.

It is not an unprimeable number, because it can be changed into a prime (76666027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1533296 + ... + 1533345.

It is an arithmetic number, because the mean of its divisors is an integer number (15844317).

Almost surely, 2^76666025 is an apocalyptic number.

It is an amenable number.

76666025 is a deficient number, since it is larger than the sum of its proper divisors (18399877).

76666025 is a wasteful number, since it uses less digits than its factorization.

76666025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3066651 (or 3066646 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 76666025 is about 8755.9137158837. The cubic root of 76666025 is about 424.8161142208.

The spelling of 76666025 in words is "seventy-six million, six hundred sixty-six thousand, twenty-five".