66156377210 has 128 divisors (see below), whose sum is σ = 156435701760. Its totient is φ = 19515340800.

The previous prime is 66156377137. The next prime is 66156377213. The reversal of 66156377210 is 1277365166.

It is not an unprimeable number, because it can be changed into a prime (66156377213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21753290 + ... + 21756330.

It is an arithmetic number, because the mean of its divisors is an integer number (1222153920).

Almost surely, 2^66156377210 is an apocalyptic number.

66156377210 is an abundant number, since it is smaller than the sum of its proper divisors (90279324550).

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

66156377210 is a wasteful number, since it uses less digits than its factorization.

66156377210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4572.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 66156377210 in words is "sixty-six billion, one hundred fifty-six million, three hundred seventy-seven thousand, two hundred ten".