670187205656520 has 128 divisors (see below), whose sum is σ = 2019678830582400. Its totient is φ = 177906540099584.

The previous prime is 670187205656509. The next prime is 670187205656531. The reversal of 670187205656520 is 25656502781076.

It is an interprime number because it is at equal distance from previous prime (670187205656509) and next prime (670187205656531).

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 112830874 + ... + 118622006.

It is an arithmetic number, because the mean of its divisors is an integer number (15778740863925).

Almost surely, 2^{670187205656520} is an apocalyptic number.

670187205656520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670187205656520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1009839415291200).

670187205656520 is an abundant number, since it is smaller than the sum of its proper divisors (1349491624925880).

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

670187205656520 is a wasteful number, since it uses less digits than its factorization.

670187205656520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5795519 (or 5795515 counting only the distinct ones).

The product of its (nonzero) digits is 42336000, while the sum is 60.

The spelling of 670187205656520 in words is "six hundred seventy trillion, one hundred eighty-seven billion, two hundred five million, six hundred fifty-six thousand, five hundred twenty".