60661621497 has 4 divisors (see below), whose sum is σ = 80882162000. Its totient is φ = 40441080996.

The previous prime is 60661621487. The next prime is 60661621513. The reversal of 60661621497 is 79412616606.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 60661621497 - 2³¹ = 58514137849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60661621487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10110270247 + ... + 10110270252.

It is an arithmetic number, because the mean of its divisors is an integer number (20220540500).

Almost surely, 2^60661621497 is an apocalyptic number.

It is an amenable number.

60661621497 is a deficient number, since it is larger than the sum of its proper divisors (20220540503).

60661621497 is a wasteful number, since it uses less digits than its factorization.

60661621497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20220540502.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 60661621497 in words is "sixty billion, six hundred sixty-one million, six hundred twenty-one thousand, four hundred ninety-seven".