4070691666 has 64 divisors (see below), whose sum is σ = 9227520000. Its totient is φ = 1329809616.

The previous prime is 4070691649. The next prime is 4070691671. The reversal of 4070691666 is 6661960704.

It is a happy number.

4070691666 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1141995 + ... + 1145553.

It is an arithmetic number, because the mean of its divisors is an integer number (144180000).

Almost surely, 2^4070691666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4070691666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4613760000).

4070691666 is an abundant number, since it is smaller than the sum of its proper divisors (5156828334).

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

4070691666 is a wasteful number, since it uses less digits than its factorization.

4070691666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988 (or 3982 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 4070691666 is about 63801.9722735904. The cubic root of 4070691666 is about 1596.6978335092.

The spelling of 4070691666 in words is "four billion, seventy million, six hundred ninety-one thousand, six hundred sixty-six".