76478771 has 4 divisors (see below), whose sum is σ = 79116000. Its totient is φ = 73841544.

The previous prime is 76478747. The next prime is 76478791. The reversal of 76478771 is 17787467.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76478771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76478791) 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, 1318571 + ... + 1318628.

It is an arithmetic number, because the mean of its divisors is an integer number (19779000).

Almost surely, 2^76478771 is an apocalyptic number.

76478771 is a deficient number, since it is larger than the sum of its proper divisors (2637229).

76478771 is a wasteful number, since it uses less digits than its factorization.

76478771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637228.

The product of its digits is 460992, while the sum is 47.

The square root of 76478771 is about 8745.2141769084. The cubic root of 76478771 is about 424.4699662390.

The spelling of 76478771 in words is "seventy-six million, four hundred seventy-eight thousand, seven hundred seventy-one".