4721190661 has 16 divisors (see below), whose sum is σ = 5428938240. Its totient is φ = 4060491120.

The previous prime is 4721190659. The next prime is 4721190671. The reversal of 4721190661 is 1660911274.

It is a cyclic number.

It is not a de Polignac number, because 4721190661 - 2¹ = 4721190659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4721190661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4721190641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140086 + ... + 170488.

It is an arithmetic number, because the mean of its divisors is an integer number (339308640).

Almost surely, 2^4721190661 is an apocalyptic number.

It is an amenable number.

4721190661 is a deficient number, since it is larger than the sum of its proper divisors (707747579).

4721190661 is a wasteful number, since it uses less digits than its factorization.

4721190661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31176.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 4721190661 is about 68710.9209733067. The cubic root of 4721190661 is about 1677.5823431602.

The spelling of 4721190661 in words is "four billion, seven hundred twenty-one million, one hundred ninety thousand, six hundred sixty-one".