361253666 has 4 divisors (see below), whose sum is σ = 541880502. Its totient is φ = 180626832.

The previous prime is 361253647. The next prime is 361253677. The reversal of 361253666 is 666352163.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666352163 = 10247 ⋅65029.

It can be written as a sum of positive squares in only one way, i.e., 240715225 + 120538441 = 15515^2 + 10979^2 .

It is a super-2 number, since 2×361253666² = 261008422396879112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90313415 + ... + 90313418.

Almost surely, 2^361253666 is an apocalyptic number.

361253666 is a deficient number, since it is larger than the sum of its proper divisors (180626836).

361253666 is a wasteful number, since it uses less digits than its factorization.

361253666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180626835.

The product of its digits is 116640, while the sum is 38.

The square root of 361253666 is about 19006.6742488001. The cubic root of 361253666 is about 712.2034738602.

The spelling of 361253666 in words is "three hundred sixty-one million, two hundred fifty-three thousand, six hundred sixty-six".