661461444083 has 16 divisors (see below), whose sum is σ = 770478863616. Its totient is φ = 561807486240.

The previous prime is 661461444071. The next prime is 661461444101. The reversal of 661461444083 is 380444164166.

It is not a de Polignac number, because 661461444083 - 2²⁴ = 661444666867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (661461449083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30389960 + ... + 30411717.

It is an arithmetic number, because the mean of its divisors is an integer number (48154928976).

Almost surely, 2^661461444083 is an apocalyptic number.

661461444083 is a deficient number, since it is larger than the sum of its proper divisors (109017419533).

661461444083 is a wasteful number, since it uses less digits than its factorization.

661461444083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60801754.

The product of its (nonzero) digits is 1327104, while the sum is 47.

The spelling of 661461444083 in words is "six hundred sixty-one billion, four hundred sixty-one million, four hundred forty-four thousand, eighty-three".