53666667 has 12 divisors (see below), whose sum is σ = 77770264. Its totient is φ = 35661600.

The previous prime is 53666629. The next prime is 53666677. The reversal of 53666667 is 76666635.

It is a happy number.

It is not a de Polignac number, because 53666667 - 2¹¹ = 53664619 is a prime.

It is a super-2 number, since 2×53666667² = 5760222293777778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53666677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6709 + ... + 12342.

Almost surely, 2^53666667 is an apocalyptic number.

53666667 is a deficient number, since it is larger than the sum of its proper divisors (24103597).

53666667 is a wasteful number, since it uses less digits than its factorization.

53666667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19370 (or 19367 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The square root of 53666667 is about 7325.7536813628. The cubic root of 53666667 is about 377.1969809302.

The spelling of 53666667 in words is "fifty-three million, six hundred sixty-six thousand, six hundred sixty-seven".