651670081 has 2 divisors, whose sum is σ = 651670082. Its totient is φ = 651670080.

The previous prime is 651670007. The next prime is 651670093. The reversal of 651670081 is 180076156.

651670081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497513025 + 154157056 = 22305^2 + 12416^2 .

It is a cyclic number.

It is not a de Polignac number, because 651670081 - 2²³ = 643281473 is a prime.

It is a super-2 number, since 2×651670081² = 849347788941093122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (651673081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325835040 + 325835041.

It is an arithmetic number, because the mean of its divisors is an integer number (325835041).

Almost surely, 2^651670081 is an apocalyptic number.

It is an amenable number.

651670081 is a deficient number, since it is larger than the sum of its proper divisors (1).

651670081 is an equidigital number, since it uses as much as digits as its factorization.

651670081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 651670081 is about 25527.8295395437. The cubic root of 651670081 is about 866.9803628881.

The spelling of 651670081 in words is "six hundred fifty-one million, six hundred seventy thousand, eighty-one".