70661216 has 24 divisors (see below), whose sum is σ = 140498064. Its totient is φ = 34979200.

The previous prime is 70661203. The next prime is 70661219. The reversal of 70661216 is 61216607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70661219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7700 + ... + 14163.

It is an arithmetic number, because the mean of its divisors is an integer number (5854086).

Almost surely, 2^70661216 is an apocalyptic number.

It is an amenable number.

70661216 is a deficient number, since it is larger than the sum of its proper divisors (69836848).

70661216 is a wasteful number, since it uses less digits than its factorization.

70661216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21974 (or 21966 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 70661216 is about 8406.0226028723. The cubic root of 70661216 is about 413.4221129681.

The spelling of 70661216 in words is "seventy million, six hundred sixty-one thousand, two hundred sixteen".