78106605 has 16 divisors (see below), whose sum is σ = 125193600. Its totient is φ = 41582528.

The previous prime is 78106591. The next prime is 78106607. The reversal of 78106605 is 50660187.

It is a cyclic number.

It is not a de Polignac number, because 78106605 - 2⁷ = 78106477 is a prime.

It is a super-2 number, since 2×78106605² = 12201283489252050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78106607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4639 + ... + 13331.

It is an arithmetic number, because the mean of its divisors is an integer number (7824600).

Almost surely, 2^78106605 is an apocalyptic number.

It is an amenable number.

78106605 is a deficient number, since it is larger than the sum of its proper divisors (47086995).

78106605 is a wasteful number, since it uses less digits than its factorization.

78106605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9300.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 78106605 is about 8837.7941252328. The cubic root of 78106605 is about 427.4604320274.

The spelling of 78106605 in words is "seventy-eight million, one hundred six thousand, six hundred five".