66256406 has 16 divisors (see below), whose sum is σ = 101898000. Its totient is φ = 32300928.

The previous prime is 66256397. The next prime is 66256423. The reversal of 66256406 is 60465266.

It is a super-2 number, since 2×66256406² = 8779822672073672, which contains 22 as substring.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10445 + ... + 15543.

It is an arithmetic number, because the mean of its divisors is an integer number (6368625).

Almost surely, 2^66256406 is an apocalyptic number.

66256406 is a deficient number, since it is larger than the sum of its proper divisors (35641594).

66256406 is a wasteful number, since it uses less digits than its factorization.

66256406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 66256406 is about 8139.8038059894. The cubic root of 66256406 is about 404.6466582348.

It can be divided in two parts, 6625 and 6406, that added together give a palindrome (13031).

The spelling of 66256406 in words is "sixty-six million, two hundred fifty-six thousand, four hundred six".