56666378 has 8 divisors (see below), whose sum is σ = 86196960. Its totient is φ = 27934060.

The previous prime is 56666369. The next prime is 56666383. The reversal of 56666378 is 87366665.

It is a happy number.

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

It is a super-2 number, since 2×56666378² = 6422156791277768, which contains 22 as substring.

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, 199388 + ... + 199671.

It is an arithmetic number, because the mean of its divisors is an integer number (10774620).

Almost surely, 2^56666378 is an apocalyptic number.

56666378 is a deficient number, since it is larger than the sum of its proper divisors (29530582).

56666378 is a wasteful number, since it uses less digits than its factorization.

56666378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399132.

The product of its digits is 1088640, while the sum is 47.

The square root of 56666378 is about 7527.7073535041. The cubic root of 56666378 is about 384.0977986217.

The spelling of 56666378 in words is "fifty-six million, six hundred sixty-six thousand, three hundred seventy-eight".