6442670071 has 4 divisors (see below), whose sum is σ = 6442875544. Its totient is φ = 6442464600.

The previous prime is 6442670051. The next prime is 6442670083. The reversal of 6442670071 is 1700762446.

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-6442670071 is a prime.

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 6442670071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442670011) 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, 44820 + ... + 122041.

It is an arithmetic number, because the mean of its divisors is an integer number (1610718886).

Almost surely, 2^6442670071 is an apocalyptic number.

6442670071 is a deficient number, since it is larger than the sum of its proper divisors (205473).

6442670071 is a wasteful number, since it uses less digits than its factorization.

6442670071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205472.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 6442670071 is about 80266.2449040691. The cubic root of 6442670071 is about 1860.7525831662.

The spelling of 6442670071 in words is "six billion, four hundred forty-two million, six hundred seventy thousand, seventy-one".