66076057 has 4 divisors (see below), whose sum is σ = 66141796. Its totient is φ = 66010320.

The previous prime is 66076039. The next prime is 66076061. The reversal of 66076057 is 75067066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75067066 = 2 ⋅37533533.

It can be written as a sum of positive squares in 2 ways, for example, as 27499536 + 38576521 = 5244^2 + 6211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66076057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66076027) 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, 31338 + ... + 33379.

It is an arithmetic number, because the mean of its divisors is an integer number (16535449).

Almost surely, 2^66076057 is an apocalyptic number.

It is an amenable number.

66076057 is a deficient number, since it is larger than the sum of its proper divisors (65739).

66076057 is a wasteful number, since it uses less digits than its factorization.

66076057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65738.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 66076057 is about 8128.7180416103. The cubic root of 66076057 is about 404.2791771132.

The spelling of 66076057 in words is "sixty-six million, seventy-six thousand, fifty-seven".