655070720 has 40 divisors (see below), whose sum is σ = 1570640544. Its totient is φ = 262027264.

The previous prime is 655070719. The next prime is 655070723. The reversal of 655070720 is 27070556.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655070723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125384 + ... + 130503.

Almost surely, 2^655070720 is an apocalyptic number.

It is an amenable number.

655070720 is an abundant number, since it is smaller than the sum of its proper divisors (915569824).

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

655070720 is an equidigital number, since it uses as much as digits as its factorization.

655070720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255910 (or 255894 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 655070720 is about 25594.3493763760. The cubic root of 655070720 is about 868.4858146718.

The spelling of 655070720 in words is "six hundred fifty-five million, seventy thousand, seven hundred twenty".