661045510433 has 8 divisors (see below), whose sum is σ = 824160636480. Its totient is φ = 515100397680.

The previous prime is 661045510409. The next prime is 661045510451. The reversal of 661045510433 is 334015540166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 661045510433 - 2¹² = 661045506337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661045510733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4292503238 + ... + 4292503391.

It is an arithmetic number, because the mean of its divisors is an integer number (103020079560).

Almost surely, 2^661045510433 is an apocalyptic number.

It is an amenable number.

661045510433 is a deficient number, since it is larger than the sum of its proper divisors (163115126047).

661045510433 is a wasteful number, since it uses less digits than its factorization.

661045510433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8585006647.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 661045510433 in words is "six hundred sixty-one billion, forty-five million, five hundred ten thousand, four hundred thirty-three".