47501666 has 4 divisors (see below), whose sum is σ = 71252502. Its totient is φ = 23750832.

The previous prime is 47501659. The next prime is 47501677. The reversal of 47501666 is 66610574.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66610574 = 2 ⋅33305287.

It can be written as a sum of positive squares in only one way, i.e., 37761025 + 9740641 = 6145^2 + 3121^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11875415 + ... + 11875418.

Almost surely, 2^47501666 is an apocalyptic number.

47501666 is a deficient number, since it is larger than the sum of its proper divisors (23750836).

47501666 is a wasteful number, since it uses less digits than its factorization.

47501666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23750835.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 47501666 is about 6892.1452393286. The cubic root of 47501666 is about 362.1620561923.

The spelling of 47501666 in words is "forty-seven million, five hundred one thousand, six hundred sixty-six".