66670007 has 4 divisors (see below), whose sum is σ = 66765816. Its totient is φ = 66574200.

The previous prime is 66669997. The next prime is 66670013. The reversal of 66670007 is 70007666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66670007 - 2⁸ = 66669751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66670067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46853 + ... + 48254.

It is an arithmetic number, because the mean of its divisors is an integer number (16691454).

Almost surely, 2^66670007 is an apocalyptic number.

66670007 is a deficient number, since it is larger than the sum of its proper divisors (95809).

66670007 is an equidigital number, since it uses as much as digits as its factorization.

66670007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95808.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 66670007 is about 8165.1703595210. The cubic root of 66670007 is about 405.4869051191.

The spelling of 66670007 in words is "sixty-six million, six hundred seventy thousand, seven".