76665541 has 2 divisors, whose sum is σ = 76665542. Its totient is φ = 76665540.

The previous prime is 76665539. The next prime is 76665553. The reversal of 76665541 is 14556667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76562500 + 103041 = 8750^2 + 321^2 .

It is an emirp because it is prime and its reverse (14556667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76665541 - 2¹ = 76665539 is a prime.

Together with 76665539, it forms a pair of twin primes.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 76665494 and 76665503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76665571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38332770 + 38332771.

It is an arithmetic number, because the mean of its divisors is an integer number (38332771).

Almost surely, 2^76665541 is an apocalyptic number.

It is an amenable number.

76665541 is a deficient number, since it is larger than the sum of its proper divisors (1).

76665541 is an equidigital number, since it uses as much as digits as its factorization.

76665541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 76665541 is about 8755.8860773767. The cubic root of 76665541 is about 424.8152202506.

The spelling of 76665541 in words is "seventy-six million, six hundred sixty-five thousand, five hundred forty-one".