661350533745 has 32 divisors (see below), whose sum is σ = 1154449013760. Its totient is φ = 320629327040.

The previous prime is 661350533737. The next prime is 661350533771. The reversal of 661350533745 is 547335053166.

661350533745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 661350533745 - 2³ = 661350533737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 661350533694 and 661350533703.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2013286 + ... + 2318624.

It is an arithmetic number, because the mean of its divisors is an integer number (36076531680).

Almost surely, 2^661350533745 is an apocalyptic number.

It is an amenable number.

661350533745 is a deficient number, since it is larger than the sum of its proper divisors (493098480015).

661350533745 is a wasteful number, since it uses less digits than its factorization.

661350533745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318485.

The product of its (nonzero) digits is 3402000, while the sum is 48.

The spelling of 661350533745 in words is "six hundred sixty-one billion, three hundred fifty million, five hundred thirty-three thousand, seven hundred forty-five".