669371870 has 8 divisors (see below), whose sum is σ = 1204869384. Its totient is φ = 267748744.

The previous prime is 669371861. The next prime is 669371873. The reversal of 669371870 is 78173966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669371873) 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, 33468584 + ... + 33468603.

It is an arithmetic number, because the mean of its divisors is an integer number (150608673).

Almost surely, 2^669371870 is an apocalyptic number.

669371870 is a deficient number, since it is larger than the sum of its proper divisors (535497514).

669371870 is a wasteful number, since it uses less digits than its factorization.

669371870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66937194.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 669371870 is about 25872.2219764751. The cubic root of 669371870 is about 874.7604764794.

The spelling of 669371870 in words is "six hundred sixty-nine million, three hundred seventy-one thousand, eight hundred seventy".