66162461 has 2 divisors, whose sum is σ = 66162462. Its totient is φ = 66162460.

The previous prime is 66162457. The next prime is 66162527. The reversal of 66162461 is 16426166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 14394436 = 7195^2 + 3794^2 .

It is a cyclic number.

It is not a de Polignac number, because 66162461 - 2² = 66162457 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 (66162361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33081230 + 33081231.

It is an arithmetic number, because the mean of its divisors is an integer number (33081231).

Almost surely, 2^66162461 is an apocalyptic number.

It is an amenable number.

66162461 is a deficient number, since it is larger than the sum of its proper divisors (1).

66162461 is an equidigital number, since it uses as much as digits as its factorization.

66162461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 66162461 is about 8134.0310424783. The cubic root of 66162461 is about 404.4553181883.

The spelling of 66162461 in words is "sixty-six million, one hundred sixty-two thousand, four hundred sixty-one".