266693402 has 4 divisors (see below), whose sum is σ = 400040106. Its totient is φ = 133346700.

The previous prime is 266693389. The next prime is 266693411. The reversal of 266693402 is 204396662.

266693402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204396662 = 2 ⋅102198331.

It can be written as a sum of positive squares in only one way, i.e., 219069601 + 47623801 = 14801^2 + 6901^2 .

It is a super-2 number, since 2×266693402² = 142250741340667208, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 66673349 + ... + 66673352.

Almost surely, 2^266693402 is an apocalyptic number.

266693402 is a deficient number, since it is larger than the sum of its proper divisors (133346704).

266693402 is a wasteful number, since it uses less digits than its factorization.

266693402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133346703.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 266693402 is about 16330.7501970975. The cubic root of 266693402 is about 643.6810995854.

The spelling of 266693402 in words is "two hundred sixty-six million, six hundred ninety-three thousand, four hundred two".