60661897939 has 2 divisors, whose sum is σ = 60661897940. Its totient is φ = 60661897938.

The previous prime is 60661897921. The next prime is 60661897943. The reversal of 60661897939 is 93979816606.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 60661897939 - 2⁷ = 60661897811 is a prime.

It is not a weakly prime, because it can be changed into another prime (60661897909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30330948969 + 30330948970.

It is an arithmetic number, because the mean of its divisors is an integer number (30330948970).

Almost surely, 2^60661897939 is an apocalyptic number.

60661897939 is a deficient number, since it is larger than the sum of its proper divisors (1).

60661897939 is an equidigital number, since it uses as much as digits as its factorization.

60661897939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26453952, while the sum is 64.

The spelling of 60661897939 in words is "sixty billion, six hundred sixty-one million, eight hundred ninety-seven thousand, nine hundred thirty-nine".