7538071666 has 8 divisors (see below), whose sum is σ = 11902218480. Its totient is φ = 3570665508.

The previous prime is 7538071657. The next prime is 7538071669. The reversal of 7538071666 is 6661708357.

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

It is not an unprimeable number, because it can be changed into a prime (7538071669) 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, 99185116 + ... + 99185191.

It is an arithmetic number, because the mean of its divisors is an integer number (1487777310).

Almost surely, 2^7538071666 is an apocalyptic number.

7538071666 is a deficient number, since it is larger than the sum of its proper divisors (4364146814).

7538071666 is a wasteful number, since it uses less digits than its factorization.

7538071666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198370328.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The square root of 7538071666 is about 86822.0690032206. The cubic root of 7538071666 is about 1960.7403549404.

The spelling of 7538071666 in words is "seven billion, five hundred thirty-eight million, seventy-one thousand, six hundred sixty-six".