7470721666 has 8 divisors (see below), whose sum is σ = 11264753664. Its totient is φ = 3715803780.

The previous prime is 7470721633. The next prime is 7470721711. The reversal of 7470721666 is 6661270747.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9778050 + ... + 9778813.

It is an arithmetic number, because the mean of its divisors is an integer number (1408094208).

Almost surely, 2^7470721666 is an apocalyptic number.

7470721666 is a deficient number, since it is larger than the sum of its proper divisors (3794031998).

7470721666 is a wasteful number, since it uses less digits than its factorization.

7470721666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19557056.

The product of its (nonzero) digits is 592704, while the sum is 46.

The square root of 7470721666 is about 86433.3365432574. The cubic root of 7470721666 is about 1954.8833699607.

The spelling of 7470721666 in words is "seven billion, four hundred seventy million, seven hundred twenty-one thousand, six hundred sixty-six".