77616851 has 8 divisors (see below), whose sum is σ = 84102480. Its totient is φ = 71204832.

The previous prime is 77616841. The next prime is 77616853. The reversal of 77616851 is 15861677.

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

It is a cyclic number.

It is not a de Polignac number, because 77616851 - 2¹⁸ = 77354707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77616799 and 77616808.

It is not an unprimeable number, because it can be changed into a prime (77616853) 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, 16196 + ... + 20433.

It is an arithmetic number, because the mean of its divisors is an integer number (10512810).

Almost surely, 2^77616851 is an apocalyptic number.

77616851 is a deficient number, since it is larger than the sum of its proper divisors (6485629).

77616851 is a wasteful number, since it uses less digits than its factorization.

77616851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36805.

The product of its digits is 70560, while the sum is 41.

The square root of 77616851 is about 8810.0426219173. The cubic root of 77616851 is about 426.5651191304.

The spelling of 77616851 in words is "seventy-seven million, six hundred sixteen thousand, eight hundred fifty-one".