651550065 has 32 divisors (see below), whose sum is σ = 1073181312. Its totient is φ = 337344000.

The previous prime is 651550037. The next prime is 651550073. The reversal of 651550065 is 560055156.

It is not a de Polignac number, because 651550065 - 2⁷ = 651549937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127255 + ... + 132275.

It is an arithmetic number, because the mean of its divisors is an integer number (33536916).

Almost surely, 2^651550065 is an apocalyptic number.

It is an amenable number.

651550065 is a deficient number, since it is larger than the sum of its proper divisors (421631247).

651550065 is a wasteful number, since it uses less digits than its factorization.

651550065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5281.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 651550065 is about 25525.4787418375. The cubic root of 651550065 is about 866.9271366179.

The spelling of 651550065 in words is "six hundred fifty-one million, five hundred fifty thousand, sixty-five".