651320663 has 8 divisors (see below), whose sum is σ = 751324032. Its totient is φ = 553056696.

The previous prime is 651320611. The next prime is 651320737. The reversal of 651320663 is 366023156.

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

It is a cyclic number.

It is not a de Polignac number, because 651320663 - 2¹⁶ = 651255127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651320963) 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 7 ways as a sum of consecutive naturals, for example, 434045 + ... + 435542.

It is an arithmetic number, because the mean of its divisors is an integer number (93915504).

Almost surely, 2^651320663 is an apocalyptic number.

651320663 is a deficient number, since it is larger than the sum of its proper divisors (100003369).

651320663 is a wasteful number, since it uses less digits than its factorization.

651320663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869701.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 651320663 is about 25520.9847576460. The cubic root of 651320663 is about 866.8253802195.

The spelling of 651320663 in words is "six hundred fifty-one million, three hundred twenty thousand, six hundred sixty-three".