66755542 has 12 divisors (see below), whose sum is σ = 116481780. Its totient is φ = 28609476.

The previous prime is 66755539. The next prime is 66755551. The reversal of 66755542 is 24555766.

It is a junction number, because it is equal to n+sod(n) for n = 66755495 and 66755504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 340492 + ... + 340687.

It is an arithmetic number, because the mean of its divisors is an integer number (9706815).

Almost surely, 2^66755542 is an apocalyptic number.

66755542 is a deficient number, since it is larger than the sum of its proper divisors (49726238).

66755542 is a wasteful number, since it uses less digits than its factorization.

66755542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681195 (or 681188 counting only the distinct ones).

The product of its digits is 252000, while the sum is 40.

The square root of 66755542 is about 8170.4064770365. The cubic root of 66755542 is about 405.6602389370.

The spelling of 66755542 in words is "sixty-six million, seven hundred fifty-five thousand, five hundred forty-two".