66249356 has 24 divisors (see below), whose sum is σ = 120242304. Its totient is φ = 31904640.

The previous prime is 66249343. The next prime is 66249377. The reversal of 66249356 is 65394266.

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, 27746 + ... + 30038.

It is an arithmetic number, because the mean of its divisors is an integer number (5010096).

Almost surely, 2^66249356 is an apocalyptic number.

It is an amenable number.

66249356 is a deficient number, since it is larger than the sum of its proper divisors (53992948).

66249356 is a wasteful number, since it uses less digits than its factorization.

66249356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561 (or 2559 counting only the distinct ones).

The product of its digits is 233280, while the sum is 41.

The square root of 66249356 is about 8139.3707373482. The cubic root of 66249356 is about 404.6323056094.

The spelling of 66249356 in words is "sixty-six million, two hundred forty-nine thousand, three hundred fifty-six".