66770408 has 16 divisors (see below), whose sum is σ = 131784000. Its totient is φ = 31628016.

The previous prime is 66770387. The next prime is 66770413. The reversal of 66770408 is 80407766.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 219488 + ... + 219791.

It is an arithmetic number, because the mean of its divisors is an integer number (8236500).

Almost surely, 2^66770408 is an apocalyptic number.

It is an amenable number.

66770408 is a deficient number, since it is larger than the sum of its proper divisors (65013592).

66770408 is a wasteful number, since it uses less digits than its factorization.

66770408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439304 (or 439300 counting only the distinct ones).

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

The square root of 66770408 is about 8171.3161730532. The cubic root of 66770408 is about 405.6903492835.

The spelling of 66770408 in words is "sixty-six million, seven hundred seventy thousand, four hundred eight".