53406566 has 8 divisors (see below), whose sum is σ = 80142024. Its totient is φ = 26692560.

The previous prime is 53406557. The next prime is 53406593. The reversal of 53406566 is 66560435.

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

It is a super-2 number, since 2×53406566² = 5704522583824712, which contains 22 as substring.

It is a congruent number.

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, 4466 + ... + 11258.

It is an arithmetic number, because the mean of its divisors is an integer number (10017753).

Almost surely, 2^53406566 is an apocalyptic number.

53406566 is a deficient number, since it is larger than the sum of its proper divisors (26735458).

53406566 is a wasteful number, since it uses less digits than its factorization.

53406566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10726.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 53406566 is about 7307.9796113563. The cubic root of 53406566 is about 376.5866192008.

The spelling of 53406566 in words is "fifty-three million, four hundred six thousand, five hundred sixty-six".