54666681 has 8 divisors (see below), whose sum is σ = 73372224. Its totient is φ = 36202800.

The previous prime is 54666659. The next prime is 54666701. The reversal of 54666681 is 18666645.

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

It is not a de Polignac number, because 54666681 - 2⁶ = 54666617 is a prime.

It is a super-2 number, since 2×54666681² = 5976892023111522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54666641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59886 + ... + 60791.

It is an arithmetic number, because the mean of its divisors is an integer number (9171528).

Almost surely, 2^54666681 is an apocalyptic number.

It is an amenable number.

54666681 is a deficient number, since it is larger than the sum of its proper divisors (18705543).

54666681 is a wasteful number, since it uses less digits than its factorization.

54666681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120831.

The product of its digits is 207360, while the sum is 42.

The square root of 54666681 is about 7393.6919735677. The cubic root of 54666681 is about 379.5254487075.

The spelling of 54666681 in words is "fifty-four million, six hundred sixty-six thousand, six hundred eighty-one".