66377461 has 2 divisors, whose sum is σ = 66377462. Its totient is φ = 66377460.

The previous prime is 66377449. The next prime is 66377497. The reversal of 66377461 is 16477366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64400625 + 1976836 = 8025^2 + 1406^2 .

It is a cyclic number.

It is not a de Polignac number, because 66377461 - 2⁵ = 66377429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66377411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33188730 + 33188731.

It is an arithmetic number, because the mean of its divisors is an integer number (33188731).

Almost surely, 2^66377461 is an apocalyptic number.

It is an amenable number.

66377461 is a deficient number, since it is larger than the sum of its proper divisors (1).

66377461 is an equidigital number, since it uses as much as digits as its factorization.

66377461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 40.

The square root of 66377461 is about 8147.2364026092. The cubic root of 66377461 is about 404.8929473698.

The spelling of 66377461 in words is "sixty-six million, three hundred seventy-seven thousand, four hundred sixty-one".