76771643 has 16 divisors (see below), whose sum is σ = 88371360. Its totient is φ = 66064896.

The previous prime is 76771637. The next prime is 76771657. The reversal of 76771643 is 34617767.

It is a cyclic number.

It is not a de Polignac number, because 76771643 - 2⁶ = 76771579 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76771643.

It is not an unprimeable number, because it can be changed into a prime (76771663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22496 + ... + 25682.

It is an arithmetic number, because the mean of its divisors is an integer number (5523210).

Almost surely, 2^76771643 is an apocalyptic number.

76771643 is a deficient number, since it is larger than the sum of its proper divisors (11599717).

76771643 is a wasteful number, since it uses less digits than its factorization.

76771643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326.

The product of its digits is 148176, while the sum is 41.

The square root of 76771643 is about 8761.9428781521. The cubic root of 76771643 is about 425.0111055922.

The spelling of 76771643 in words is "seventy-six million, seven hundred seventy-one thousand, six hundred forty-three".