75655679 has 4 divisors (see below), whose sum is σ = 82533480. Its totient is φ = 68777880.

The previous prime is 75655633. The next prime is 75655691. The reversal of 75655679 is 97655657.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97655657 = 11 ⋅8877787.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75655679 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 (75655609) 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, 3438884 + ... + 3438905.

It is an arithmetic number, because the mean of its divisors is an integer number (20633370).

Almost surely, 2^75655679 is an apocalyptic number.

75655679 is a deficient number, since it is larger than the sum of its proper divisors (6877801).

75655679 is a wasteful number, since it uses less digits than its factorization.

75655679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6877800.

The product of its digits is 1984500, while the sum is 50.

The square root of 75655679 is about 8698.0273050848. The cubic root of 75655679 is about 422.9417044147.

The spelling of 75655679 in words is "seventy-five million, six hundred fifty-five thousand, six hundred seventy-nine".