669706370 has 8 divisors (see below), whose sum is σ = 1205471484. Its totient is φ = 267882544.

The previous prime is 669706369. The next prime is 669706391. The reversal of 669706370 is 73607966.

669706370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 641051761 + 28654609 = 25319^2 + 5353^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33485309 + ... + 33485328.

Almost surely, 2^669706370 is an apocalyptic number.

669706370 is a deficient number, since it is larger than the sum of its proper divisors (535765114).

669706370 is a wasteful number, since it uses less digits than its factorization.

669706370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66970644.

The product of its (nonzero) digits is 285768, while the sum is 44.

The square root of 669706370 is about 25878.6856312294. The cubic root of 669706370 is about 874.9061646313.

It can be divided in two parts, 669706 and 370, that added together give a palindrome (670076).

The spelling of 669706370 in words is "six hundred sixty-nine million, seven hundred six thousand, three hundred seventy".