66940774110 has 160 divisors (see below), whose sum is σ = 212346427392. Its totient is φ = 14807136960.

The previous prime is 66940774073. The next prime is 66940774157. The reversal of 66940774110 is 1147704966.

66940774110 is a `hidden beast` number, since 6 + 69 + 407 + 74 + 110 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 14652 + ... + 366191.

Almost surely, 2^66940774110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66940774110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106173213696).

66940774110 is an abundant number, since it is smaller than the sum of its proper divisors (145405653282).

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

66940774110 is a wasteful number, since it uses less digits than its factorization.

66940774110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380900 (or 380891 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 66940774110 in words is "sixty-six billion, nine hundred forty million, seven hundred seventy-four thousand, one hundred ten".