870666229978 has 8 divisors (see below), whose sum is σ = 1306729366740. Its totient is φ = 435089774400.

The previous prime is 870666229949. The next prime is 870666229991. The reversal of 870666229978 is 879922666078.

870666229978 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 542952343609 + 327713886369 = 736853^2 + 572463^2 .

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

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, 121665823 + ... + 121672978.

Almost surely, 2^870666229978 is an apocalyptic number.

870666229978 is a deficient number, since it is larger than the sum of its proper divisors (436063136762).

870666229978 is a wasteful number, since it uses less digits than its factorization.

870666229978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243340592.

The product of its (nonzero) digits is 219469824, while the sum is 70.

The spelling of 870666229978 in words is "eight hundred seventy billion, six hundred sixty-six million, two hundred twenty-nine thousand, nine hundred seventy-eight".