53366666 has 8 divisors (see below), whose sum is σ = 82002564. Its totient is φ = 26032480.

The previous prime is 53366657. The next prime is 53366681. The reversal of 53366666 is 66666335.

It can be written as a sum of positive squares in 2 ways, for example, as 50822641 + 2544025 = 7129^2 + 1595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×53366666⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

53366666 is a modest number, since divided by 6666 gives 5336 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325325 + ... + 325488.

Almost surely, 2^53366666 is an apocalyptic number.

53366666 is a deficient number, since it is larger than the sum of its proper divisors (28635898).

53366666 is a wasteful number, since it uses less digits than its factorization.

53366666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650856.

The product of its digits is 349920, while the sum is 41.

The square root of 53366666 is about 7305.2492086170. The cubic root of 53366666 is about 376.4928133220.

The spelling of 53366666 in words is "fifty-three million, three hundred sixty-six thousand, six hundred sixty-six".