56667890 has 8 divisors (see below), whose sum is σ = 102002220. Its totient is φ = 22667152.

The previous prime is 56667889. The next prime is 56667911. The reversal of 56667890 is 9876665.

It can be written as a sum of positive squares in 2 ways, for example, as 56595529 + 72361 = 7523^2 + 269^2 .

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

It is a super-2 number, since 2×56667890² = 6422499514104200, 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, 2833385 + ... + 2833404.

Almost surely, 2^56667890 is an apocalyptic number.

56667890 is a deficient number, since it is larger than the sum of its proper divisors (45334330).

56667890 is a wasteful number, since it uses less digits than its factorization.

56667890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5666796.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 56667890 is about 7527.8077818180. The cubic root of 56667890 is about 384.1012148197.

The spelling of 56667890 in words is "fifty-six million, six hundred sixty-seven thousand, eight hundred ninety".