660621334043 has 16 divisors (see below), whose sum is σ = 758702480640. Its totient is φ = 568885485600.

The previous prime is 660621334033. The next prime is 660621334103. The reversal of 660621334043 is 340433126066.

It is a cyclic number.

It is not a de Polignac number, because 660621334043 - 2²⁴ = 660604556827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660621333988 and 660621334006.

It is not an unprimeable number, because it can be changed into a prime (660621334033) 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, 1525946 + ... + 1910432.

It is an arithmetic number, because the mean of its divisors is an integer number (47418905040).

Almost surely, 2^660621334043 is an apocalyptic number.

660621334043 is a deficient number, since it is larger than the sum of its proper divisors (98081146597).

660621334043 is a wasteful number, since it uses less digits than its factorization.

660621334043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392738.

The product of its (nonzero) digits is 186624, while the sum is 38.

The spelling of 660621334043 in words is "six hundred sixty billion, six hundred twenty-one million, three hundred thirty-four thousand, forty-three".