75666677 has 4 divisors (see below), whose sum is σ = 80117676. Its totient is φ = 71215680.

The previous prime is 75666671. The next prime is 75666737. The reversal of 75666677 is 77666657.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54745201 + 20921476 = 7399^2 + 4574^2 .

It is a cyclic number.

It is not a de Polignac number, because 75666677 - 2⁸ = 75666421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75666671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2225474 + ... + 2225507.

It is an arithmetic number, because the mean of its divisors is an integer number (20029419).

Almost surely, 2^75666677 is an apocalyptic number.

It is an amenable number.

75666677 is a deficient number, since it is larger than the sum of its proper divisors (4450999).

75666677 is a wasteful number, since it uses less digits than its factorization.

75666677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450998.

The product of its digits is 2222640, while the sum is 50.

The square root of 75666677 is about 8698.6594944279. The cubic root of 75666677 is about 422.9621976438.

The spelling of 75666677 in words is "seventy-five million, six hundred sixty-six thousand, six hundred seventy-seven".