70661340 has 72 divisors (see below), whose sum is σ = 215058480. Its totient is φ = 18779904.

The previous prime is 70661329. The next prime is 70661347. The reversal of 70661340 is 4316607.

70661340 is a `hidden beast` number, since 7 + 0 + 6 + 613 + 40 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70661347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81831 + ... + 82689.

Almost surely, 2^70661340 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 70661340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107529240).

70661340 is an abundant number, since it is smaller than the sum of its proper divisors (144397140).

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

70661340 is a wasteful number, since it uses less digits than its factorization.

70661340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331 (or 1326 counting only the distinct ones).

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

The square root of 70661340 is about 8406.0299785333. The cubic root of 70661340 is about 413.4223547995.

Adding to 70661340 its reverse (4316607), we get a palindrome (74977947).

The spelling of 70661340 in words is "seventy million, six hundred sixty-one thousand, three hundred forty".