66469420 has 48 divisors (see below), whose sum is σ = 144335520. Its totient is φ = 25698816.

The previous prime is 66469411. The next prime is 66469423. The reversal of 66469420 is 2496466.

It is a self number, because there is not a number n which added to its sum of digits gives 66469420.

It is not an unprimeable number, because it can be changed into a prime (66469423) 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, 76951 + ... + 77809.

It is an arithmetic number, because the mean of its divisors is an integer number (3006990).

Almost surely, 2^66469420 is an apocalyptic number.

It is an amenable number.

66469420 is an abundant number, since it is smaller than the sum of its proper divisors (77866100).

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

66469420 is a wasteful number, since it uses less digits than its factorization.

66469420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 66469420 is about 8152.8780194481. The cubic root of 66469420 is about 405.0798399727.

The spelling of 66469420 in words is "sixty-six million, four hundred sixty-nine thousand, four hundred twenty".