670156650 has 144 divisors (see below), whose sum is σ = 1886765400. Its totient is φ = 170311680.

The previous prime is 670156639. The next prime is 670156673. The reversal of 670156650 is 56651076.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 125821089 + 544335561 = 11217^2 + 23331^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1161162 + ... + 1161738.

Almost surely, 2^670156650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670156650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943382700).

670156650 is an abundant number, since it is smaller than the sum of its proper divisors (1216608750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670156650 is a wasteful number, since it uses less digits than its factorization.

670156650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 670156650 is about 25887.3839929801. The cubic root of 670156650 is about 875.1022030279.

The spelling of 670156650 in words is "six hundred seventy million, one hundred fifty-six thousand, six hundred fifty".