660829551 has 8 divisors (see below), whose sum is σ = 881531904. Its totient is φ = 440340120.

The previous prime is 660829529. The next prime is 660829571. The reversal of 660829551 is 155928066.

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

It is not a de Polignac number, because 660829551 - 2¹⁰ = 660828527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660829571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45841 + ... + 58506.

It is an arithmetic number, because the mean of its divisors is an integer number (110191488).

Almost surely, 2^660829551 is an apocalyptic number.

660829551 is a deficient number, since it is larger than the sum of its proper divisors (220702353).

660829551 is a wasteful number, since it uses less digits than its factorization.

660829551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106461.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 660829551 is about 25706.6052017764. The cubic root of 660829551 is about 871.0233920788.

The spelling of 660829551 in words is "six hundred sixty million, eight hundred twenty-nine thousand, five hundred fifty-one".