66455340 has 48 divisors (see below), whose sum is σ = 212658432. Its totient is φ = 15189696.

The previous prime is 66455309. The next prime is 66455359. The reversal of 66455340 is 4355466.

66455340 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

66455340 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78694 + ... + 79533.

It is an arithmetic number, because the mean of its divisors is an integer number (4430384).

Almost surely, 2^66455340 is an apocalyptic number.

66455340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66455340 is an abundant number, since it is smaller than the sum of its proper divisors (146203092).

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

66455340 is a wasteful number, since it uses less digits than its factorization.

66455340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158246 (or 158244 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 66455340 is about 8152.0144749626. The cubic root of 66455340 is about 405.0512357067.

It can be divided in two parts, 66455 and 340, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 66455340 in words is "sixty-six million, four hundred fifty-five thousand, three hundred forty".