66530456 has 8 divisors (see below), whose sum is σ = 124744620. Its totient is φ = 33265224.

The previous prime is 66530447. The next prime is 66530461. The reversal of 66530456 is 65403566.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4158146 + ... + 4158161.

Almost surely, 2^66530456 is an apocalyptic number.

It is an amenable number.

66530456 is a deficient number, since it is larger than the sum of its proper divisors (58214164).

66530456 is a wasteful number, since it uses less digits than its factorization.

66530456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8316313 (or 8316309 counting only the distinct ones).

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

The square root of 66530456 is about 8156.6203785637. The cubic root of 66530456 is about 405.2037911529.

The spelling of 66530456 in words is "sixty-six million, five hundred thirty thousand, four hundred fifty-six".