66601504 has 12 divisors (see below), whose sum is σ = 131121774. Its totient is φ = 33300736.

The previous prime is 66601499. The next prime is 66601511. The reversal of 66601504 is 40510666.

It can be written as a sum of positive squares in only one way, i.e., 66389904 + 211600 = 8148^2 + 460^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040617 + ... + 1040680.

Almost surely, 2^66601504 is an apocalyptic number.

It is an amenable number.

66601504 is a deficient number, since it is larger than the sum of its proper divisors (64520270).

66601504 is a wasteful number, since it uses less digits than its factorization.

66601504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081307 (or 2081299 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66601504 is about 8160.9744516203. The cubic root of 66601504 is about 405.3479791376.

The spelling of 66601504 in words is "sixty-six million, six hundred one thousand, five hundred four".