80266779 has 12 divisors (see below), whose sum is σ = 116080536. Its totient is φ = 53446752.

The previous prime is 80266777. The next prime is 80266783. The reversal of 80266779 is 97766208.

It is a happy number.

It is not a de Polignac number, because 80266779 - 2¹ = 80266777 is a prime.

It is a super-2 number, since 2×80266779² = 12885511622069682, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (80266777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3247 + ... + 13079.

It is an arithmetic number, because the mean of its divisors is an integer number (9673378).

Almost surely, 2^80266779 is an apocalyptic number.

80266779 is a deficient number, since it is larger than the sum of its proper divisors (35813757).

80266779 is a wasteful number, since it uses less digits than its factorization.

80266779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10746 (or 10743 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 80266779 is about 8959.1728970927. The cubic root of 80266779 is about 431.3653715266.

The spelling of 80266779 in words is "eighty million, two hundred sixty-six thousand, seven hundred seventy-nine".