62661521 has 8 divisors (see below), whose sum is σ = 68407080. Its totient is φ = 57048192.

The previous prime is 62661517. The next prime is 62661523. The reversal of 62661521 is 12516626.

62661521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 819025 + 61842496 = 905^2 + 7864^2 .

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 62661521 - 2² = 62661517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (62661523) 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, 32066 + ... + 33963.

It is an arithmetic number, because the mean of its divisors is an integer number (8550885).

Almost surely, 2^62661521 is an apocalyptic number.

It is an amenable number.

62661521 is a deficient number, since it is larger than the sum of its proper divisors (5745559).

62661521 is a wasteful number, since it uses less digits than its factorization.

62661521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66115.

The product of its digits is 4320, while the sum is 29.

The square root of 62661521 is about 7915.9030438731. The cubic root of 62661521 is about 397.1918337234.

The spelling of 62661521 in words is "sixty-two million, six hundred sixty-one thousand, five hundred twenty-one".