47651661 has 12 divisors (see below), whose sum is σ = 68924700. Its totient is φ = 31724160.

The previous prime is 47651651. The next prime is 47651683. The reversal of 47651661 is 16615674.

It can be written as a sum of positive squares in 2 ways, for example, as 32558436 + 15093225 = 5706^2 + 3885^2 .

It is not a de Polignac number, because 47651661 - 2⁷ = 47651533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47651621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4165 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (5743725).

Almost surely, 2^47651661 is an apocalyptic number.

It is an amenable number.

47651661 is a deficient number, since it is larger than the sum of its proper divisors (21273039).

47651661 is a wasteful number, since it uses less digits than its factorization.

47651661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276 (or 7273 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 47651661 is about 6903.0182529094. The cubic root of 47651661 is about 362.5428528016.

The spelling of 47651661 in words is "forty-seven million, six hundred fifty-one thousand, six hundred sixty-one".