53664475 has 12 divisors (see below), whose sum is σ = 66723904. Its totient is φ = 42815520.

The previous prime is 53664439. The next prime is 53664511. The reversal of 53664475 is 57446635.

It is an interprime number because it is at equal distance from previous prime (53664439) and next prime (53664511).

It is not a de Polignac number, because 53664475 - 2¹³ = 53656283 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7222 + ... + 12628.

Almost surely, 2^53664475 is an apocalyptic number.

53664475 is a deficient number, since it is larger than the sum of its proper divisors (13059429).

53664475 is a wasteful number, since it uses less digits than its factorization.

53664475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5814 (or 5809 counting only the distinct ones).

The product of its digits is 302400, while the sum is 40.

The square root of 53664475 is about 7325.6040706552. The cubic root of 53664475 is about 377.1918453585.

The spelling of 53664475 in words is "fifty-three million, six hundred sixty-four thousand, four hundred seventy-five".