66981082 has 16 divisors (see below), whose sum is σ = 116992512. Its totient is φ = 28164240.

The previous prime is 66981073. The next prime is 66981151. The reversal of 66981082 is 28018966.

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, 44394 + ... + 45877.

It is an arithmetic number, because the mean of its divisors is an integer number (7312032).

Almost surely, 2^66981082 is an apocalyptic number.

66981082 is a deficient number, since it is larger than the sum of its proper divisors (50011430).

66981082 is a wasteful number, since it uses less digits than its factorization.

66981082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90333.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 66981082 is about 8184.1970895134. The cubic root of 66981082 is about 406.1165793979.

The spelling of 66981082 in words is "sixty-six million, nine hundred eighty-one thousand, eighty-two".