66834480 has 80 divisors (see below), whose sum is σ = 219387744. Its totient is φ = 16773120.

The previous prime is 66834451. The next prime is 66834499. The reversal of 66834480 is 8443866.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×66834480³ (a number of 24 digits) contains 333 as substring.

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, 4111 + ... + 12270.

Almost surely, 2^66834480 is an apocalyptic number.

66834480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66834480 is an abundant number, since it is smaller than the sum of its proper divisors (152553264).

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

66834480 is a wasteful number, since it uses less digits than its factorization.

66834480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16414 (or 16408 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 66834480 is about 8175.2357764165. The cubic root of 66834480 is about 405.8200728291.

The spelling of 66834480 in words is "sixty-six million, eight hundred thirty-four thousand, four hundred eighty".