66470000 has 150 divisors (see below), whose sum is σ = 178386648. Its totient is φ = 23936000.

The previous prime is 66469993. The next prime is 66470029. The reversal of 66470000 is 7466.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2889989 + ... + 2890011.

Almost surely, 2^66470000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66470000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89193324).

66470000 is an abundant number, since it is smaller than the sum of its proper divisors (111916648).

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

66470000 is a wasteful number, since it uses less digits than its factorization.

66470000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 66470000 is about 8152.9135896316. The cubic root of 66470000 is about 405.0810181868.

Multiplying 66470000 by its sum of digits (23), we get a square (1528810000 = 39100²).

66470000 divided by its sum of digits (23) gives a square (2890000 = 1700²).

Adding to 66470000 its reverse (7466), we get a palindrome (66477466).

The spelling of 66470000 in words is "sixty-six million, four hundred seventy thousand".