80665049 has 2 divisors, whose sum is σ = 80665050. Its totient is φ = 80665048.

The previous prime is 80665027. The next prime is 80665087. The reversal of 80665049 is 94056608.

It is an a-pointer prime, because the next prime (80665087) can be obtained adding 80665049 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80640400 + 24649 = 8980^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 80665049 - 2¹² = 80660953 is a prime.

It is not a weakly prime, because it can be changed into another prime (80665649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40332524 + 40332525.

It is an arithmetic number, because the mean of its divisors is an integer number (40332525).

Almost surely, 2^80665049 is an apocalyptic number.

It is an amenable number.

80665049 is a deficient number, since it is larger than the sum of its proper divisors (1).

80665049 is an equidigital number, since it uses as much as digits as its factorization.

80665049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 80665049 is about 8981.3723338920. The cubic root of 80665049 is about 432.0776484368.

The spelling of 80665049 in words is "eighty million, six hundred sixty-five thousand, forty-nine".