70331660 has 72 divisors (see below), whose sum is σ = 175911120. Its totient is φ = 23538816.

The previous prime is 70331659. The next prime is 70331663. The reversal of 70331660 is 6613307.

It is not an unprimeable number, because it can be changed into a prime (70331663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41306 + ... + 42974.

It is an arithmetic number, because the mean of its divisors is an integer number (2443210).

Almost surely, 2^70331660 is an apocalyptic number.

70331660 is a gapful number since it is divisible by the number (70) 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 70331660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87955560).

70331660 is an abundant number, since it is smaller than the sum of its proper divisors (105579460).

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

70331660 is a wasteful number, since it uses less digits than its factorization.

70331660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735 (or 1726 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 70331660 is about 8386.3973194692. The cubic root of 70331660 is about 412.7783930336.

Adding to 70331660 its reverse (6613307), we get a palindrome (76944967).

The spelling of 70331660 in words is "seventy million, three hundred thirty-one thousand, six hundred sixty".