77550806 has 4 divisors (see below), whose sum is σ = 116326212. Its totient is φ = 38775402.

The previous prime is 77550797. The next prime is 77550829. The reversal of 77550806 is 60805577.

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

It is a super-2 number, since 2×77550806² = 12028255022499272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77550806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19387700 + ... + 19387703.

It is an arithmetic number, because the mean of its divisors is an integer number (29081553).

Almost surely, 2^77550806 is an apocalyptic number.

77550806 is a deficient number, since it is larger than the sum of its proper divisors (38775406).

77550806 is a wasteful number, since it uses less digits than its factorization.

77550806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38775405.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 77550806 is about 8806.2935449598. The cubic root of 77550806 is about 426.4440952055. Note that the first 3 decimals are identical.

The spelling of 77550806 in words is "seventy-seven million, five hundred fifty thousand, eight hundred six".