60668521 has 3 divisors (see below), whose sum is σ = 60676311.
Its totient is φ = 60660732.
The previous prime is 60668513. The next prime is 60668527. The reversal of 60668521 is 12586606.
The square root of 60668521 is 7789.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in only one way, i.e., 35868121 + 24800400 = 5989^2 + 4980^2
It is not a de Polignac number, because 60668521 - 23 = 60668513 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (60668527) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3895 + ... + 11683.
It is an arithmetic number, because the mean of its divisors is an integer number (20225437).
Almost surely, 260668521 is an apocalyptic number.
60668521 is the 7789-th square number.
60668521 is the 3895-th centered octagonal number.
It is an amenable number.
60668521 is a deficient number, since it is larger than the sum of its proper divisors (7790).
60668521 is an frugal number, since it uses more digits than its factorization.
60668521 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 15578 (or 7789 counting only the distinct ones).
The product of its (nonzero) digits is 17280, while the sum is 34.
The cubic root of 60668521 is about 392.9353812094.
The spelling of 60668521 in words is "sixty million, six hundred sixty-eight thousand, five hundred twenty-one".