670575478 has 4 divisors (see below), whose sum is σ = 1005863220. Its totient is φ = 335287738.

The previous prime is 670575473. The next prime is 670575487. The reversal of 670575478 is 874575076.

It is a happy number.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670575473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167643868 + ... + 167643871.

It is an arithmetic number, because the mean of its divisors is an integer number (251465805).

Almost surely, 2^670575478 is an apocalyptic number.

670575478 is a deficient number, since it is larger than the sum of its proper divisors (335287742).

670575478 is a wasteful number, since it uses less digits than its factorization.

670575478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335287741.

The product of its (nonzero) digits is 1646400, while the sum is 49.

The square root of 670575478 is about 25895.4721524826. The cubic root of 670575478 is about 875.2844693571.

The spelling of 670575478 in words is "six hundred seventy million, five hundred seventy-five thousand, four hundred seventy-eight".