71425663 has 4 divisors (see below), whose sum is σ = 71443240. Its totient is φ = 71408088.

The previous prime is 71425657. The next prime is 71425723. The reversal of 71425663 is 36652417.

It is a happy number.

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 71425663 - 2¹⁷ = 71294591 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 (71425163) 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, 781 + ... + 11977.

It is an arithmetic number, because the mean of its divisors is an integer number (17860810).

Almost surely, 2^71425663 is an apocalyptic number.

71425663 is a deficient number, since it is larger than the sum of its proper divisors (17577).

71425663 is a wasteful number, since it uses less digits than its factorization.

71425663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17576.

The product of its digits is 30240, while the sum is 34.

The square root of 71425663 is about 8451.3704805789. The cubic root of 71425663 is about 414.9076351272.

The spelling of 71425663 in words is "seventy-one million, four hundred twenty-five thousand, six hundred sixty-three".