661546303413 has 32 divisors (see below), whose sum is σ = 936780888960. Its totient is φ = 414526909440.

The previous prime is 661546303403. The next prime is 661546303421. The reversal of 661546303413 is 314303645166.

It is not a de Polignac number, because 661546303413 - 2⁶ = 661546303349 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661546303403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1427206 + ... + 1833032.

It is an arithmetic number, because the mean of its divisors is an integer number (29274402780).

Almost surely, 2^661546303413 is an apocalyptic number.

It is an amenable number.

661546303413 is a deficient number, since it is larger than the sum of its proper divisors (275234585547).

661546303413 is a wasteful number, since it uses less digits than its factorization.

661546303413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406357.

The product of its (nonzero) digits is 466560, while the sum is 42.

Adding to 661546303413 its reverse (314303645166), we get a palindrome (975849948579).

The spelling of 661546303413 in words is "six hundred sixty-one billion, five hundred forty-six million, three hundred three thousand, four hundred thirteen".