66975017 has 8 divisors (see below), whose sum is σ = 68716032. Its totient is φ = 65239200.

The previous prime is 66974989. The next prime is 66975031. The reversal of 66975017 is 71057966.

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

It is not a de Polignac number, because 66975017 - 2¹² = 66970921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66975067) 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, 49808 + ... + 51134.

It is an arithmetic number, because the mean of its divisors is an integer number (8589504).

Almost surely, 2^66975017 is an apocalyptic number.

It is an amenable number.

66975017 is a deficient number, since it is larger than the sum of its proper divisors (1741015).

66975017 is a wasteful number, since it uses less digits than its factorization.

66975017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 66975017 is about 8183.8265499704. The cubic root of 66975017 is about 406.1043213526.

The spelling of 66975017 in words is "sixty-six million, nine hundred seventy-five thousand, seventeen".