75726665 has 16 divisors (see below), whose sum is σ = 105815808. Its totient is φ = 50945856.

The previous prime is 75726659. The next prime is 75726667. The reversal of 75726665 is 56662757.

It is a cyclic number.

It is not a de Polignac number, because 75726665 - 2¹⁶ = 75661129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75726667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18557 + ... + 22266.

It is an arithmetic number, because the mean of its divisors is an integer number (6613488).

Almost surely, 2^75726665 is an apocalyptic number.

It is an amenable number.

75726665 is a deficient number, since it is larger than the sum of its proper divisors (30089143).

75726665 is a wasteful number, since it uses less digits than its factorization.

75726665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40888.

The product of its digits is 529200, while the sum is 44.

The square root of 75726665 is about 8702.1069287845. The cubic root of 75726665 is about 423.0739419201.

The spelling of 75726665 in words is "seventy-five million, seven hundred twenty-six thousand, six hundred sixty-five".