66707542 has 12 divisors (see below), whose sum is σ = 109985148. Its totient is φ = 30321500.

The previous prime is 66707539. The next prime is 66707561. The reversal of 66707542 is 24570766.

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, 137584 + ... + 138067.

It is an arithmetic number, because the mean of its divisors is an integer number (9165429).

Almost surely, 2^66707542 is an apocalyptic number.

66707542 is a deficient number, since it is larger than the sum of its proper divisors (43277606).

66707542 is a wasteful number, since it uses less digits than its factorization.

66707542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275675 (or 275664 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 66707542 is about 8167.4685184578. The cubic root of 66707542 is about 405.5629867852.

The spelling of 66707542 in words is "sixty-six million, seven hundred seven thousand, five hundred forty-two".