77906851 has 8 divisors (see below), whose sum is σ = 85169664. Its totient is φ = 70674120.

The previous prime is 77906837. The next prime is 77906891. The reversal of 77906851 is 15860977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77906851 - 2¹³ = 77898659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77906798 and 77906807.

It is not an unprimeable number, because it can be changed into a prime (77906891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1915 + ... + 12628.

It is an arithmetic number, because the mean of its divisors is an integer number (10646208).

Almost surely, 2^77906851 is an apocalyptic number.

77906851 is a deficient number, since it is larger than the sum of its proper divisors (7262813).

77906851 is a wasteful number, since it uses less digits than its factorization.

77906851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15041.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 77906851 is about 8826.4857672802. The cubic root of 77906851 is about 427.0957175633.

It can be divided in two parts, 7790 and 6851, that added together give a palindrome (14641).

The spelling of 77906851 in words is "seventy-seven million, nine hundred six thousand, eight hundred fifty-one".