66670694 has 8 divisors (see below), whose sum is σ = 100114488. Its totient is φ = 33299200.

The previous prime is 66670691. The next prime is 66670699. The reversal of 66670694 is 49607666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66670691) 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, 15707 + ... + 19494.

It is an arithmetic number, because the mean of its divisors is an integer number (12514311).

Almost surely, 2^66670694 is an apocalyptic number.

66670694 is a deficient number, since it is larger than the sum of its proper divisors (33443794).

66670694 is a wasteful number, since it uses less digits than its factorization.

66670694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36150.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 66670694 is about 8165.2124283450. The cubic root of 66670694 is about 405.4882978921.

The spelling of 66670694 in words is "sixty-six million, six hundred seventy thousand, six hundred ninety-four".