66813702 has 8 divisors (see below), whose sum is σ = 133627416. Its totient is φ = 22271232.

The previous prime is 66813679. The next prime is 66813707. The reversal of 66813702 is 20731866.

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

66813702 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66813707) 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, 5567803 + ... + 5567814.

It is an arithmetic number, because the mean of its divisors is an integer number (16703427).

Almost surely, 2^66813702 is an apocalyptic number.

66813702 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66813702 is a wasteful number, since it uses less digits than its factorization.

66813702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11135622.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 66813702 is about 8173.9648885960. The cubic root of 66813702 is about 405.7780136831.

The spelling of 66813702 in words is "sixty-six million, eight hundred thirteen thousand, seven hundred two".