47777766 has 8 divisors (see below), whose sum is σ = 95555544. Its totient is φ = 15925920.

The previous prime is 47777749. The next prime is 47777783. The reversal of 47777766 is 66777774.

It is an interprime number because it is at equal distance from previous prime (47777749) and next prime (47777783).

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

47777766 is an admirable number.

It is a congruent number.

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, 3981475 + ... + 3981486.

It is an arithmetic number, because the mean of its divisors is an integer number (11944443).

Almost surely, 2^47777766 is an apocalyptic number.

47777766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47777766 is a wasteful number, since it uses less digits than its factorization.

47777766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7962966.

The product of its digits is 2420208, while the sum is 51.

The square root of 47777766 is about 6912.1462658135. The cubic root of 47777766 is about 362.8623813344.

The spelling of 47777766 in words is "forty-seven million, seven hundred seventy-seven thousand, seven hundred sixty-six".