76441661 has 2 divisors, whose sum is σ = 76441662. Its totient is φ = 76441660.

The previous prime is 76441643. The next prime is 76441663. The reversal of 76441661 is 16614467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74736025 + 1705636 = 8645^2 + 1306^2 .

It is an emirp because it is prime and its reverse (16614467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76441661 - 2⁶ = 76441597 is a prime.

Together with 76441663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76441663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38220830 + 38220831.

It is an arithmetic number, because the mean of its divisors is an integer number (38220831).

Almost surely, 2^76441661 is an apocalyptic number.

It is an amenable number.

76441661 is a deficient number, since it is larger than the sum of its proper divisors (1).

76441661 is an equidigital number, since it uses as much as digits as its factorization.

76441661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 76441661 is about 8743.0921875501. The cubic root of 76441661 is about 424.4012995631.

The spelling of 76441661 in words is "seventy-six million, four hundred forty-one thousand, six hundred sixty-one".