47706661 has 4 divisors (see below), whose sum is σ = 48082432. Its totient is φ = 47330892.

The previous prime is 47706629. The next prime is 47706683. The reversal of 47706661 is 16660774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47706661 - 2⁵ = 47706629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47706661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47706611) 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, 187695 + ... + 187948.

It is an arithmetic number, because the mean of its divisors is an integer number (12020608).

Almost surely, 2^47706661 is an apocalyptic number.

It is an amenable number.

47706661 is a deficient number, since it is larger than the sum of its proper divisors (375771).

47706661 is a wasteful number, since it uses less digits than its factorization.

47706661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375770.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 47706661 is about 6907.0008686839. Note that the first 3 decimals coincide. The cubic root of 47706661 is about 362.6822826403.

The spelling of 47706661 in words is "forty-seven million, seven hundred six thousand, six hundred sixty-one".