76663471 has 4 divisors (see below), whose sum is σ = 76824000. Its totient is φ = 76502944.

The previous prime is 76663469. The next prime is 76663511. The reversal of 76663471 is 17436667.

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

It is a cyclic number.

It is not a de Polignac number, because 76663471 - 2¹ = 76663469 is a prime.

It is a super-3 number, since 3×76663471³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (76667471) 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, 79546 + ... + 80503.

It is an arithmetic number, because the mean of its divisors is an integer number (19206000).

Almost surely, 2^76663471 is an apocalyptic number.

76663471 is a deficient number, since it is larger than the sum of its proper divisors (160529).

76663471 is a wasteful number, since it uses less digits than its factorization.

76663471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160528.

The product of its digits is 127008, while the sum is 40.

The square root of 76663471 is about 8755.7678703812. The cubic root of 76663471 is about 424.8113968230.

The spelling of 76663471 in words is "seventy-six million, six hundred sixty-three thousand, four hundred seventy-one".