66760417 has 4 divisors (see below), whose sum is σ = 66776836. Its totient is φ = 66744000.

The previous prime is 66760409. The next prime is 66760439. The reversal of 66760417 is 71406766.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 33074001 + 33686416 = 5751^2 + 5804^2 .

It is a cyclic number.

It is not a de Polignac number, because 66760417 - 2³ = 66760409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66760487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2917 + ... + 11917.

It is an arithmetic number, because the mean of its divisors is an integer number (16694209).

Almost surely, 2^66760417 is an apocalyptic number.

It is an amenable number.

66760417 is a deficient number, since it is larger than the sum of its proper divisors (16419).

66760417 is an equidigital number, since it uses as much as digits as its factorization.

66760417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16418.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 66760417 is about 8170.7048043605. The cubic root of 66760417 is about 405.6701135005.

The spelling of 66760417 in words is "sixty-six million, seven hundred sixty thousand, four hundred seventeen".