66403552 has 12 divisors (see below), whose sum is σ = 130732056. Its totient is φ = 33201760.

The previous prime is 66403549. The next prime is 66403583. The reversal of 66403552 is 25530466.

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, 1037524 + ... + 1037587.

It is an arithmetic number, because the mean of its divisors is an integer number (10894338).

Almost surely, 2^66403552 is an apocalyptic number.

It is an amenable number.

66403552 is a deficient number, since it is larger than the sum of its proper divisors (64328504).

66403552 is a wasteful number, since it uses less digits than its factorization.

66403552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075121 (or 2075113 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 66403552 is about 8148.8374630986. The cubic root of 66403552 is about 404.9459908673.

The spelling of 66403552 in words is "sixty-six million, four hundred three thousand, five hundred fifty-two".