671007440078 has 4 divisors (see below), whose sum is σ = 1006511160120. Its totient is φ = 335503720038.

The previous prime is 671007440053. The next prime is 671007440111. The reversal of 671007440078 is 870044700176.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167751860018 + ... + 167751860021.

It is an arithmetic number, because the mean of its divisors is an integer number (251627790030).

Almost surely, 2^671007440078 is an apocalyptic number.

671007440078 is a deficient number, since it is larger than the sum of its proper divisors (335503720042).

671007440078 is a wasteful number, since it uses less digits than its factorization.

671007440078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335503720041.

The product of its (nonzero) digits is 263424, while the sum is 44.

The spelling of 671007440078 in words is "six hundred seventy-one billion, seven million, four hundred forty thousand, seventy-eight".