78066607 has 2 divisors, whose sum is σ = 78066608. Its totient is φ = 78066606.

The previous prime is 78066589. The next prime is 78066619. The reversal of 78066607 is 70666087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78066607 - 2⁷ = 78066479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78066607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78066647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39033303 + 39033304.

It is an arithmetic number, because the mean of its divisors is an integer number (39033304).

Almost surely, 2^78066607 is an apocalyptic number.

78066607 is a deficient number, since it is larger than the sum of its proper divisors (1).

78066607 is an equidigital number, since it uses as much as digits as its factorization.

78066607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 78066607 is about 8835.5309404698. The cubic root of 78066607 is about 427.3874527887.

The spelling of 78066607 in words is "seventy-eight million, sixty-six thousand, six hundred seven".