66676771 has 24 divisors (see below), whose sum is σ = 84071520. Its totient is φ = 51561216.

The previous prime is 66676759. The next prime is 66676787. The reversal of 66676771 is 17767666.

66676771 = T₃₅₈ + T₃₅₉ + ... + T₇₆₃.

It is a de Polignac number, because none of the positive numbers 2^k-66676771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66676271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 479620 + ... + 479758.

It is an arithmetic number, because the mean of its divisors is an integer number (3502980).

Almost surely, 2^66676771 is an apocalyptic number.

66676771 is a deficient number, since it is larger than the sum of its proper divisors (17394749).

66676771 is a wasteful number, since it uses less digits than its factorization.

66676771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 192 counting only the distinct ones).

The product of its digits is 444528, while the sum is 46.

The square root of 66676771 is about 8165.5845473548. The cubic root of 66676771 is about 405.5006175355.

The spelling of 66676771 in words is "sixty-six million, six hundred seventy-six thousand, seven hundred seventy-one".