7666745 has 8 divisors (see below), whose sum is σ = 9741384. Its totient is φ = 5772544.

The previous prime is 7666741. The next prime is 7666787. The reversal of 7666745 is 5476667.

It can be written as a sum of positive squares in 4 ways, for example, as 1771561 + 5895184 = 1331^2 + 2428^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7666745 - 2² = 7666741 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7666741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45014 + ... + 45183.

It is an arithmetic number, because the mean of its divisors is an integer number (1217673).

Almost surely, 2^7666745 is an apocalyptic number.

It is an amenable number.

7666745 is a deficient number, since it is larger than the sum of its proper divisors (2074639).

7666745 is a wasteful number, since it uses less digits than its factorization.

7666745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90219.

The product of its digits is 211680, while the sum is 41.

The square root of 7666745 is about 2768.8887662743. Note that the first 3 decimals coincide. The cubic root of 7666745 is about 197.1833948854.

The spelling of 7666745 in words is "seven million, six hundred sixty-six thousand, seven hundred forty-five".