661434006 has 8 divisors (see below), whose sum is σ = 1322868024. Its totient is φ = 220478000.

The previous prime is 661433989. The next prime is 661434019. The reversal of 661434006 is 600434166.

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

661434006 is an admirable number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 55119495 + ... + 55119506.

It is an arithmetic number, because the mean of its divisors is an integer number (165358503).

Almost surely, 2^661434006 is an apocalyptic number.

661434006 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

661434006 is a wasteful number, since it uses less digits than its factorization.

661434006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110239006.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 661434006 is about 25718.3593178103. The cubic root of 661434006 is about 871.2888836359.

The spelling of 661434006 in words is "six hundred sixty-one million, four hundred thirty-four thousand, six".