60661621501 has 16 divisors (see below), whose sum is σ = 65944295424. Its totient is φ = 55468373184.

The previous prime is 60661621487. The next prime is 60661621513. The reversal of 60661621501 is 10512616606.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60661621501 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 (60661621591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1049970 + ... + 1106236.

It is an arithmetic number, because the mean of its divisors is an integer number (4121518464).

Almost surely, 2^60661621501 is an apocalyptic number.

It is an amenable number.

60661621501 is a deficient number, since it is larger than the sum of its proper divisors (5282673923).

60661621501 is a wasteful number, since it uses less digits than its factorization.

60661621501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57060.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 60661621501 in words is "sixty billion, six hundred sixty-one million, six hundred twenty-one thousand, five hundred one".