66782051 has 12 divisors (see below), whose sum is σ = 77820048. Its totient is φ = 57142512.

The previous prime is 66782047. The next prime is 66782081. The reversal of 66782051 is 15028766.

It is not a de Polignac number, because 66782051 - 2² = 66782047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66782081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48170 + ... + 49536.

It is an arithmetic number, because the mean of its divisors is an integer number (6485004).

Almost surely, 2^66782051 is an apocalyptic number.

66782051 is a deficient number, since it is larger than the sum of its proper divisors (11037997).

66782051 is a wasteful number, since it uses less digits than its factorization.

66782051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378 (or 2371 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 66782051 is about 8172.0285731267. The cubic root of 66782051 is about 405.7139284826.

The spelling of 66782051 in words is "sixty-six million, seven hundred eighty-two thousand, fifty-one".