66001039 has 8 divisors (see below), whose sum is σ = 71168832. Its totient is φ = 60846240.

The previous prime is 66001037. The next prime is 66001049. The reversal of 66001039 is 93010066.

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

It is not a de Polignac number, because 66001039 - 2¹ = 66001037 is a prime.

It is a super-2 number, since 2×66001039² = 8712274298159042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66001037) 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, 9057 + ... + 14629.

It is an arithmetic number, because the mean of its divisors is an integer number (8896104).

Almost surely, 2^66001039 is an apocalyptic number.

66001039 is a deficient number, since it is larger than the sum of its proper divisors (5167793).

66001039 is a wasteful number, since it uses less digits than its factorization.

66001039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6497.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 66001039 is about 8124.1023504139. The cubic root of 66001039 is about 404.1261226816.

The spelling of 66001039 in words is "sixty-six million, one thousand, thirty-nine".