661042334 has 8 divisors (see below), whose sum is σ = 992090808. Its totient is φ = 330345400.

The previous prime is 661042321. The next prime is 661042339. The reversal of 661042334 is 433240166.

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

It is a junction number, because it is equal to n+sod(n) for n = 661042297 and 661042306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661042339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83132 + ... + 90735.

It is an arithmetic number, because the mean of its divisors is an integer number (124011351).

Almost surely, 2^661042334 is an apocalyptic number.

661042334 is a deficient number, since it is larger than the sum of its proper divisors (331048474).

661042334 is a wasteful number, since it uses less digits than its factorization.

661042334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175770.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 661042334 is about 25710.7435520640. The cubic root of 661042334 is about 871.1168700824.

The spelling of 661042334 in words is "six hundred sixty-one million, forty-two thousand, three hundred thirty-four".