66649470270 has 32 divisors (see below), whose sum is σ = 161426247840. Its totient is φ = 17610134400.

The previous prime is 66649470263. The next prime is 66649470289. The reversal of 66649470270 is 7207494666.

It is a super-2 number, since 2×66649470270² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10187781 + ... + 10194320.

It is an arithmetic number, because the mean of its divisors is an integer number (5044570245).

Almost surely, 2^66649470270 is an apocalyptic number.

66649470270 is an abundant number, since it is smaller than the sum of its proper divisors (94776777570).

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

66649470270 is a wasteful number, since it uses less digits than its factorization.

66649470270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20382220.

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 66649470270 in words is "sixty-six billion, six hundred forty-nine million, four hundred seventy thousand, two hundred seventy".