266700139 has 4 divisors (see below), whose sum is σ = 268399024. Its totient is φ = 265001256.

The previous prime is 266700089. The next prime is 266700143. The reversal of 266700139 is 931007662.

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

It is a cyclic number.

It is not a de Polignac number, because 266700139 - 2⁹ = 266699627 is a prime.

It is a super-2 number, since 2×266700139² = 142257928285238642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266700179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849207 + ... + 849520.

It is an arithmetic number, because the mean of its divisors is an integer number (67099756).

Almost surely, 2^266700139 is an apocalyptic number.

266700139 is a deficient number, since it is larger than the sum of its proper divisors (1698885).

266700139 is a wasteful number, since it uses less digits than its factorization.

266700139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698884.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 266700139 is about 16330.9564631102. The cubic root of 266700139 is about 643.6865195958.

The spelling of 266700139 in words is "two hundred sixty-six million, seven hundred thousand, one hundred thirty-nine".