66469626 has 64 divisors (see below), whose sum is σ = 159096960. Its totient is φ = 20494080.

The previous prime is 66469621. The next prime is 66469633. The reversal of 66469626 is 62696466.

It is a super-2 number, since 2×66469626² = 8836422361159752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66469621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55405 + ... + 56591.

It is an arithmetic number, because the mean of its divisors is an integer number (2485890).

Almost surely, 2^66469626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66469626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79548480).

66469626 is an abundant number, since it is smaller than the sum of its proper divisors (92627334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66469626 is a wasteful number, since it uses less digits than its factorization.

66469626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1270 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 66469626 is about 8152.8906530138. The cubic root of 66469626 is about 405.0802584426.

The spelling of 66469626 in words is "sixty-six million, four hundred sixty-nine thousand, six hundred twenty-six".