68521330 has 8 divisors (see below), whose sum is σ = 123338412. Its totient is φ = 27408528.

The previous prime is 68521309. The next prime is 68521331. The reversal of 68521330 is 3312586.

It can be written as a sum of positive squares in 2 ways, for example, as 68211081 + 310249 = 8259^2 + 557^2 .

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

It is not an unprimeable number, because it can be changed into a prime (68521331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3426057 + ... + 3426076.

Almost surely, 2^68521330 is an apocalyptic number.

68521330 is a deficient number, since it is larger than the sum of its proper divisors (54817082).

68521330 is a wasteful number, since it uses less digits than its factorization.

68521330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6852140.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 68521330 is about 8277.7611707514. The cubic root of 68521330 is about 409.2059388160.

The spelling of 68521330 in words is "sixty-eight million, five hundred twenty-one thousand, three hundred thirty".