60661613 has 4 divisors (see below), whose sum is σ = 61492668. Its totient is φ = 59830560.

The previous prime is 60661583. The next prime is 60661621. The reversal of 60661613 is 31616606.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11142244 + 49519369 = 3338^2 + 7037^2 .

It is a cyclic number.

It is not a de Polignac number, because 60661613 - 2¹⁴ = 60645229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60661693) 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, 415418 + ... + 415563.

It is an arithmetic number, because the mean of its divisors is an integer number (15373167).

Almost surely, 2^60661613 is an apocalyptic number.

It is an amenable number.

60661613 is a deficient number, since it is larger than the sum of its proper divisors (831055).

60661613 is an equidigital number, since it uses as much as digits as its factorization.

60661613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831054.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 60661613 is about 7788.5565414909. The cubic root of 60661613 is about 392.9204668266.

The spelling of 60661613 in words is "sixty million, six hundred sixty-one thousand, six hundred thirteen".