66380392 has 32 divisors (see below), whose sum is σ = 139870080.
Its totient is φ = 29304000.
The previous prime is 66380387. The next prime is 66380399. The reversal of 66380392 is 29308366.
It is a happy number.
It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.
It is a house number.
It is not an unprimeable number, because it can be changed into a prime (66380399) 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, 11484 + ... + 16267.
It is an arithmetic number, because the mean of its divisors is an integer number (4370940).
Almost surely, 266380392 is an apocalyptic number.
It is an amenable number.
66380392 is an abundant number, since it is smaller than the sum of its proper divisors (73489688).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
66380392 is a wasteful number, since it uses less digits than its factorization.
66380392 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 27793 (or 27789 counting only the distinct ones).
The product of its (nonzero) digits is 46656, while the sum is 37.
The square root of 66380392 is about 8147.4162775692.
The cubic root of 66380392 is about 404.8989068413.
The spelling of 66380392 in words is "sixty-six million, three hundred eighty thousand, three hundred ninety-two".