66499672 has 32 divisors (see below), whose sum is σ = 129254400. Its totient is φ = 32052384.

The previous prime is 66499651. The next prime is 66499687. The reversal of 66499672 is 27699466.

It is a super-2 number, since 2×66499672² = 8844412752215168, 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 7 ways as a sum of consecutive naturals, for example, 25953 + ... + 28399.

It is an arithmetic number, because the mean of its divisors is an integer number (4039200).

Almost surely, 2^66499672 is an apocalyptic number.

It is an amenable number.

66499672 is a deficient number, since it is larger than the sum of its proper divisors (62754728).

66499672 is a wasteful number, since it uses less digits than its factorization.

66499672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575 (or 2571 counting only the distinct ones).

The product of its digits is 979776, while the sum is 49.

The square root of 66499672 is about 8154.7331041549. The cubic root of 66499672 is about 405.1412848531.

The spelling of 66499672 in words is "sixty-six million, four hundred ninety-nine thousand, six hundred seventy-two".