78016877 has 4 divisors (see below), whose sum is σ = 79181376. Its totient is φ = 76852380.

The previous prime is 78016867. The next prime is 78016879. The reversal of 78016877 is 77861087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78016877 - 2²⁶ = 10908013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78016879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582149 + ... + 582282.

It is an arithmetic number, because the mean of its divisors is an integer number (19795344).

Almost surely, 2^78016877 is an apocalyptic number.

It is an amenable number.

78016877 is a deficient number, since it is larger than the sum of its proper divisors (1164499).

78016877 is a wasteful number, since it uses less digits than its factorization.

78016877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164498.

The product of its (nonzero) digits is 131712, while the sum is 44.

The square root of 78016877 is about 8832.7162866244. The cubic root of 78016877 is about 427.2966820417.

The spelling of 78016877 in words is "seventy-eight million, sixteen thousand, eight hundred seventy-seven".