68530657 has 8 divisors (see below), whose sum is σ = 74274536. Its totient is φ = 62854272.

The previous prime is 68530601. The next prime is 68530661. The reversal of 68530657 is 75603586.

It can be written as a sum of positive squares in 4 ways, for example, as 2742336 + 65788321 = 1656^2 + 8111^2 .

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

It is not a de Polignac number, because 68530657 - 2⁷ = 68530529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68530667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14748 + ... + 18829.

It is an arithmetic number, because the mean of its divisors is an integer number (9284317).

Almost surely, 2^68530657 is an apocalyptic number.

It is an amenable number.

68530657 is a deficient number, since it is larger than the sum of its proper divisors (5743879).

68530657 is a wasteful number, since it uses less digits than its factorization.

68530657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33747.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 68530657 is about 8278.3245285504. The cubic root of 68530657 is about 409.2245047653.

The spelling of 68530657 in words is "sixty-eight million, five hundred thirty thousand, six hundred fifty-seven".