39966007985 has 8 divisors (see below), whose sum is σ = 48424833600. Its totient is φ = 31662390384.

The previous prime is 39966007973. The next prime is 39966007987. The reversal of 39966007985 is 58970066993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39966007985 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39966007987) 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, 38801435 + ... + 38802464.

It is an arithmetic number, because the mean of its divisors is an integer number (6053104200).

Almost surely, 2^39966007985 is an apocalyptic number.

It is an amenable number.

39966007985 is a deficient number, since it is larger than the sum of its proper divisors (8458825615).

39966007985 is a wasteful number, since it uses less digits than its factorization.

39966007985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77604007.

The product of its (nonzero) digits is 22044960, while the sum is 62.

The spelling of 39966007985 in words is "thirty-nine billion, nine hundred sixty-six million, seven thousand, nine hundred eighty-five".