70668640 has 48 divisors (see below), whose sum is σ = 190808352. Its totient is φ = 24228864.

The previous prime is 70668617. The next prime is 70668659. The reversal of 70668640 is 4686607.

It is a self number, because there is not a number n which added to its sum of digits gives 70668640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30429 + ... + 32668.

It is an arithmetic number, because the mean of its divisors is an integer number (3975174).

Almost surely, 2^70668640 is an apocalyptic number.

70668640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

70668640 is an abundant number, since it is smaller than the sum of its proper divisors (120139712).

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

70668640 is a wasteful number, since it uses less digits than its factorization.

70668640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63119 (or 63111 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 70668640 is about 8406.4641794276. The cubic root of 70668640 is about 413.4365911522.

The spelling of 70668640 in words is "seventy million, six hundred sixty-eight thousand, six hundred forty".