56666667 has 16 divisors (see below), whose sum is σ = 80686080. Its totient is φ = 35296800.

The previous prime is 56666663. The next prime is 56666671. The reversal of 56666667 is 76666665.

It is an interprime number because it is at equal distance from previous prime (56666663) and next prime (56666671).

It is not a de Polignac number, because 56666667 - 2² = 56666663 is a prime.

It is a super-2 number, since 2×56666667² = 6422222297777778, which contains 22 as substring.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (56666663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7809 + ... + 13202.

It is an arithmetic number, because the mean of its divisors is an integer number (5042880).

Almost surely, 2^56666667 is an apocalyptic number.

56666667 is a deficient number, since it is larger than the sum of its proper divisors (24019413).

56666667 is a wasteful number, since it uses less digits than its factorization.

56666667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21074.

The product of its digits is 1632960, while the sum is 48.

The square root of 56666667 is about 7527.7265492312. The cubic root of 56666667 is about 384.0984515902.

The spelling of 56666667 in words is "fifty-six million, six hundred sixty-six thousand, six hundred sixty-seven".