66772802 has 16 divisors (see below), whose sum is σ = 106920000. Its totient is φ = 31182480.

The previous prime is 66772801. The next prime is 66772813. The reversal of 66772802 is 20827766.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (66772801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9677 + ... + 15072.

It is an arithmetic number, because the mean of its divisors is an integer number (6682500).

Almost surely, 2^66772802 is an apocalyptic number.

66772802 is a deficient number, since it is larger than the sum of its proper divisors (40147198).

66772802 is a wasteful number, since it uses less digits than its factorization.

66772802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24841.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 66772802 is about 8171.4626597691. The cubic root of 66772802 is about 405.6951977941.

The spelling of 66772802 in words is "sixty-six million, seven hundred seventy-two thousand, eight hundred two".