866151047 has 2 divisors, whose sum is σ = 866151048. Its totient is φ = 866151046.

The previous prime is 866151031. The next prime is 866151103. The reversal of 866151047 is 740151668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866151047 - 2⁴ = 866151031 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866151047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866151647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433075523 + 433075524.

It is an arithmetic number, because the mean of its divisors is an integer number (433075524).

Almost surely, 2^866151047 is an apocalyptic number.

866151047 is a deficient number, since it is larger than the sum of its proper divisors (1).

866151047 is an equidigital number, since it uses as much as digits as its factorization.

866151047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 866151047 is about 29430.4442202288. Note that the first 3 decimals coincide. The cubic root of 866151047 is about 953.2303868520.

The spelling of 866151047 in words is "eight hundred sixty-six million, one hundred fifty-one thousand, forty-seven".