66768450 has 48 divisors (see below), whose sum is σ = 189243840. Its totient is φ = 15261120.

The previous prime is 66768439. The next prime is 66768463. The reversal of 66768450 is 5486766.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30745 + ... + 32844.

It is an arithmetic number, because the mean of its divisors is an integer number (3942580).

Almost surely, 2^66768450 is an apocalyptic number.

66768450 is an abundant number, since it is smaller than the sum of its proper divisors (122475390).

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

66768450 is a wasteful number, since it uses less digits than its factorization.

66768450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63611 (or 63606 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 66768450 is about 8171.1963628345. The cubic root of 66768450 is about 405.6863837071.

The spelling of 66768450 in words is "sixty-six million, seven hundred sixty-eight thousand, four hundred fifty".