66776146 has 8 divisors (see below), whose sum is σ = 105436080. Its totient is φ = 31630788.

The previous prime is 66776137. The next prime is 66776147. The reversal of 66776146 is 64167766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66776146² = 8918107349226632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66776147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878596 + ... + 878671.

It is an arithmetic number, because the mean of its divisors is an integer number (13179510).

Almost surely, 2^66776146 is an apocalyptic number.

66776146 is a deficient number, since it is larger than the sum of its proper divisors (38659934).

66776146 is a wasteful number, since it uses less digits than its factorization.

66776146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757288.

The product of its digits is 254016, while the sum is 43.

The square root of 66776146 is about 8171.6672717384. The cubic root of 66776146 is about 405.7019701228.

The spelling of 66776146 in words is "sixty-six million, seven hundred seventy-six thousand, one hundred forty-six".