78716266 has 16 divisors (see below), whose sum is σ = 124221600. Its totient is φ = 37355248.

The previous prime is 78716233. The next prime is 78716299. The reversal of 78716266 is 66261787.

78716266 = 456² + 457² + ... + 691².

It is an interprime number because it is at equal distance from previous prime (78716233) and next prime (78716299).

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 8080 + ... + 14923.

It is an arithmetic number, because the mean of its divisors is an integer number (7763850).

Almost surely, 2^78716266 is an apocalyptic number.

78716266 is a deficient number, since it is larger than the sum of its proper divisors (45505334).

78716266 is a wasteful number, since it uses less digits than its factorization.

78716266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23093.

The product of its digits is 169344, while the sum is 43.

The square root of 78716266 is about 8872.2187754811. The cubic root of 78716266 is about 428.5697314113.

The spelling of 78716266 in words is "seventy-eight million, seven hundred sixteen thousand, two hundred sixty-six".