66407867 has 8 divisors (see below), whose sum is σ = 68118336. Its totient is φ = 64705032.

The previous prime is 66407857. The next prime is 66407903. The reversal of 66407867 is 76870466.

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

It is a cyclic number.

It is not a de Polignac number, because 66407867 - 2¹⁴ = 66391483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66407857) 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, 18428 + ... + 21734.

It is an arithmetic number, because the mean of its divisors is an integer number (8514792).

Almost surely, 2^66407867 is an apocalyptic number.

66407867 is a deficient number, since it is larger than the sum of its proper divisors (1710469).

66407867 is a wasteful number, since it uses less digits than its factorization.

66407867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3817.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 66407867 is about 8149.1022204903. The cubic root of 66407867 is about 404.9547620050.

The spelling of 66407867 in words is "sixty-six million, four hundred seven thousand, eight hundred sixty-seven".