651246065 has 16 divisors (see below), whose sum is σ = 815788560. Its totient is φ = 498597120.

The previous prime is 651246023. The next prime is 651246083. The reversal of 651246065 is 560642156.

It can be written as a sum of positive squares in 8 ways, for example, as 104060401 + 547185664 = 10201^2 + 23392^2 .

It is not a de Polignac number, because 651246065 - 2¹⁰ = 651245041 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17570 + ... + 40139.

It is an arithmetic number, because the mean of its divisors is an integer number (50986785).

Almost surely, 2^651246065 is an apocalyptic number.

It is an amenable number.

651246065 is a deficient number, since it is larger than the sum of its proper divisors (164542495).

651246065 is a wasteful number, since it uses less digits than its factorization.

651246065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57812.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 651246065 is about 25519.5232126308. The cubic root of 651246065 is about 866.7922854567.

The spelling of 651246065 in words is "six hundred fifty-one million, two hundred forty-six thousand, sixty-five".