66849072 has 40 divisors (see below), whose sum is σ = 174415920. Its totient is φ = 22060800.

The previous prime is 66849067. The next prime is 66849073. The reversal of 66849072 is 27094866.

It is a super-2 number, since 2×66849072² = 8937596854522368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66849073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2047 + ... + 11742.

It is an arithmetic number, because the mean of its divisors is an integer number (4360398).

Almost surely, 2^66849072 is an apocalyptic number.

It is an amenable number.

66849072 is an abundant number, since it is smaller than the sum of its proper divisors (107566848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66849072 is a wasteful number, since it uses less digits than its factorization.

66849072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13901 (or 13895 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 66849072 is about 8176.1281790344. The cubic root of 66849072 is about 405.8496049687.

The spelling of 66849072 in words is "sixty-six million, eight hundred forty-nine thousand, seventy-two".