60666521 has 8 divisors (see below), whose sum is σ = 62920200. Its totient is φ = 58423680.

The previous prime is 60666499. The next prime is 60666533. The reversal of 60666521 is 12566606.

It can be written as a sum of positive squares in 4 ways, for example, as 774400 + 59892121 = 880^2 + 7739^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60666521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60666581) 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, 9725 + ... + 14693.

It is an arithmetic number, because the mean of its divisors is an integer number (7865025).

Almost surely, 2^60666521 is an apocalyptic number.

It is an amenable number.

60666521 is a deficient number, since it is larger than the sum of its proper divisors (2253679).

60666521 is a wasteful number, since it uses less digits than its factorization.

60666521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5419.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 60666521 is about 7788.8716127562. The cubic root of 60666521 is about 392.9310633228.

The spelling of 60666521 in words is "sixty million, six hundred sixty-six thousand, five hundred twenty-one".