77406806 has 4 divisors (see below), whose sum is σ = 116110212. Its totient is φ = 38703402.

The previous prime is 77406803. The next prime is 77406839. The reversal of 77406806 is 60860477.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 77406806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77406803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19351700 + ... + 19351703.

It is an arithmetic number, because the mean of its divisors is an integer number (29027553).

Almost surely, 2^77406806 is an apocalyptic number.

77406806 is a deficient number, since it is larger than the sum of its proper divisors (38703406).

77406806 is a wasteful number, since it uses less digits than its factorization.

77406806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38703405.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 77406806 is about 8798.1137751225. The cubic root of 77406806 is about 426.1799844867.

The spelling of 77406806 in words is "seventy-seven million, four hundred six thousand, eight hundred six".