70663140 has 72 divisors (see below), whose sum is σ = 221752440. Its totient is φ = 18192384.

The previous prime is 70663139. The next prime is 70663157. The reversal of 70663140 is 4136607.

It can be written as a sum of positive squares in 4 ways, for example, as 25826724 + 44836416 = 5082^2 + 6696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1549 + ... + 11988.

It is an arithmetic number, because the mean of its divisors is an integer number (3079895).

Almost surely, 2^70663140 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 70663140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110876220).

70663140 is an abundant number, since it is smaller than the sum of its proper divisors (151089300).

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

70663140 is a wasteful number, since it uses less digits than its factorization.

70663140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13581 (or 13576 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 70663140 is about 8406.1370438508. The cubic root of 70663140 is about 413.4258652241.

Adding to 70663140 its reverse (4136607), we get a palindrome (74799747).

The spelling of 70663140 in words is "seventy million, six hundred sixty-three thousand, one hundred forty".