266955506 has 4 divisors (see below), whose sum is σ = 400433262. Its totient is φ = 133477752.

The previous prime is 266955499. The next prime is 266955547. The reversal of 266955506 is 605559662.

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

It can be written as a sum of positive squares in only one way, i.e., 246207481 + 20748025 = 15691^2 + 4555^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66738875 + ... + 66738878.

Almost surely, 2^266955506 is an apocalyptic number.

266955506 is a deficient number, since it is larger than the sum of its proper divisors (133477756).

266955506 is a wasteful number, since it uses less digits than its factorization.

266955506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133477755.

The product of its (nonzero) digits is 486000, while the sum is 44.

The square root of 266955506 is about 16338.7730873527. The cubic root of 266955506 is about 643.8918986408.

The spelling of 266955506 in words is "two hundred sixty-six million, nine hundred fifty-five thousand, five hundred six".