661846434 has 16 divisors (see below), whose sum is σ = 1324200960. Its totient is φ = 220530800.

The previous prime is 661846429. The next prime is 661846441. The reversal of 661846434 is 434648166.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3042 + ... + 36509.

It is an arithmetic number, because the mean of its divisors is an integer number (82762560).

Almost surely, 2^661846434 is an apocalyptic number.

661846434 is an abundant number, since it is smaller than the sum of its proper divisors (662354526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661846434 is a wasteful number, since it uses less digits than its factorization.

661846434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42345.

The product of its digits is 331776, while the sum is 42.

The square root of 661846434 is about 25726.3762314089. The cubic root of 661846434 is about 871.4699393755.

The spelling of 661846434 in words is "six hundred sixty-one million, eight hundred forty-six thousand, four hundred thirty-four".