66971005 has 32 divisors (see below), whose sum is σ = 87920640. Its totient is φ = 48840960.

The previous prime is 66970961. The next prime is 66971053. The reversal of 66971005 is 50017966.

It is not a de Polignac number, because 66971005 - 2⁹ = 66970493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211107 + ... + 211423.

It is an arithmetic number, because the mean of its divisors is an integer number (2747520).

Almost surely, 2^66971005 is an apocalyptic number.

It is an amenable number.

66971005 is a deficient number, since it is larger than the sum of its proper divisors (20949635).

66971005 is a wasteful number, since it uses less digits than its factorization.

66971005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 66971005 is about 8183.5814286900. The cubic root of 66971005 is about 406.0962122440.

The spelling of 66971005 in words is "sixty-six million, nine hundred seventy-one thousand, five".