651165061 has 4 divisors (see below), whose sum is σ = 651325132. Its totient is φ = 651004992.

The previous prime is 651164989. The next prime is 651165071. The reversal of 651165061 is 160561156.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 615536100 + 35628961 = 24810^2 + 5969^2 .

It is a cyclic number.

It is not a de Polignac number, because 651165061 - 2⁷ = 651164933 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 (651165071) 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 3 ways as a sum of consecutive naturals, for example, 73770 + ... + 82123.

It is an arithmetic number, because the mean of its divisors is an integer number (162831283).

Almost surely, 2^651165061 is an apocalyptic number.

It is an amenable number.

651165061 is a deficient number, since it is larger than the sum of its proper divisors (160071).

651165061 is a wasteful number, since it uses less digits than its factorization.

651165061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160070.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 651165061 is about 25517.9360646585. The cubic root of 651165061 is about 866.7563458647.

The spelling of 651165061 in words is "six hundred fifty-one million, one hundred sixty-five thousand, sixty-one".