661354006 has 8 divisors (see below), whose sum is σ = 1035162864. Its totient is φ = 316299720.

The previous prime is 661354003. The next prime is 661354007. The reversal of 661354006 is 600453166.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661354003) 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, 7188585 + ... + 7188676.

It is an arithmetic number, because the mean of its divisors is an integer number (129395358).

Almost surely, 2^661354006 is an apocalyptic number.

661354006 is a deficient number, since it is larger than the sum of its proper divisors (373808858).

661354006 is a wasteful number, since it uses less digits than its factorization.

661354006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14377286.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 661354006 is about 25716.8039616123. The cubic root of 661354006 is about 871.2537549506.

The spelling of 661354006 in words is "six hundred sixty-one million, three hundred fifty-four thousand, six".