670505136 has 160 divisors (see below), whose sum is σ = 2102722560. Its totient is φ = 179843328.

The previous prime is 670505123. The next prime is 670505141. The reversal of 670505136 is 631505076.

It is a junction number, because it is equal to n+sod(n) for n = 670505097 and 670505106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 810355 + ... + 811181.

It is an arithmetic number, because the mean of its divisors is an integer number (13142016).

Almost surely, 2^670505136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670505136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1051361280).

670505136 is an abundant number, since it is smaller than the sum of its proper divisors (1432217424).

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

670505136 is a wasteful number, since it uses less digits than its factorization.

670505136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 670505136 is about 25894.1139257554. The cubic root of 670505136 is about 875.2538631017.

The spelling of 670505136 in words is "six hundred seventy million, five hundred five thousand, one hundred thirty-six".