60666740521 has 2 divisors, whose sum is σ = 60666740522. Its totient is φ = 60666740520.

The previous prime is 60666740473. The next prime is 60666740531. The reversal of 60666740521 is 12504766606.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57984640000 + 2682100521 = 240800^2 + 51789^2 .

It is a cyclic number.

It is not a de Polignac number, because 60666740521 - 2¹⁷ = 60666609449 is a prime.

It is a super-3 number, since 3×60666740521³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (60666740531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30333370260 + 30333370261.

It is an arithmetic number, because the mean of its divisors is an integer number (30333370261).

Almost surely, 2^60666740521 is an apocalyptic number.

It is an amenable number.

60666740521 is a deficient number, since it is larger than the sum of its proper divisors (1).

60666740521 is an equidigital number, since it uses as much as digits as its factorization.

60666740521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 60666740521 in words is "sixty billion, six hundred sixty-six million, seven hundred forty thousand, five hundred twenty-one".