697066728480 has 144 divisors (see below), whose sum is σ = 2466841837824. Its totient is φ = 185884450560.

The previous prime is 697066728439. The next prime is 697066728481. The reversal of 697066728480 is 84827660796.

697066728480 is a `hidden beast` number, since 6 + 9 + 70 + 6 + 67 + 28 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×697066728480² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (697066728481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8925456 + ... + 9003215.

It is an arithmetic number, because the mean of its divisors is an integer number (17130846096).

Almost surely, 2^697066728480 is an apocalyptic number.

697066728480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

697066728480 is an abundant number, since it is smaller than the sum of its proper divisors (1769775109344).

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

697066728480 is a wasteful number, since it uses less digits than its factorization.

697066728480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17928701 (or 17928681 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 697066728480 in words is "six hundred ninety-seven billion, sixty-six million, seven hundred twenty-eight thousand, four hundred eighty".