677547721 has 8 divisors (see below), whose sum is σ = 683726400. Its totient is φ = 671391600.

The previous prime is 677547719. The next prime is 677547727. The reversal of 677547721 is 127745776.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 677547721 - 2¹ = 677547719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677547727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57915 + ... + 68623.

It is an arithmetic number, because the mean of its divisors is an integer number (85465800).

Almost surely, 2^677547721 is an apocalyptic number.

It is an amenable number.

677547721 is a deficient number, since it is larger than the sum of its proper divisors (6178679).

677547721 is a wasteful number, since it uses less digits than its factorization.

677547721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11279.

The product of its digits is 576240, while the sum is 46.

The square root of 677547721 is about 26029.7468485577. The cubic root of 677547721 is about 878.3075775275.

The spelling of 677547721 in words is "six hundred seventy-seven million, five hundred forty-seven thousand, seven hundred twenty-one".