706665720 has 32 divisors (see below), whose sum is σ = 2119997520. Its totient is φ = 188444160.

The previous prime is 706665703. The next prime is 706665737. The reversal of 706665720 is 27566607.

It is an interprime number because it is at equal distance from previous prime (706665703) and next prime (706665737).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2944321 + ... + 2944560.

Almost surely, 2^706665720 is an apocalyptic number.

It is an amenable number.

706665720 is an abundant number, since it is smaller than the sum of its proper divisors (1413331800).

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

706665720 is a wasteful number, since it uses less digits than its factorization.

706665720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888895 (or 5888891 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 706665720 is about 26583.1849107664. The cubic root of 706665720 is about 890.7134455224.

The spelling of 706665720 in words is "seven hundred six million, six hundred sixty-five thousand, seven hundred twenty".