66461371 has 2 divisors, whose sum is σ = 66461372. Its totient is φ = 66461370.

The previous prime is 66461341. The next prime is 66461383. The reversal of 66461371 is 17316466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66461371 is a prime.

It is a super-2 number, since 2×66461371² = 8834227670399282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66461341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33230685 + 33230686.

It is an arithmetic number, because the mean of its divisors is an integer number (33230686).

Almost surely, 2^66461371 is an apocalyptic number.

66461371 is a deficient number, since it is larger than the sum of its proper divisors (1).

66461371 is an equidigital number, since it uses as much as digits as its factorization.

66461371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 66461371 is about 8152.3843751384. The cubic root of 66461371 is about 405.0634884974.

The spelling of 66461371 in words is "sixty-six million, four hundred sixty-one thousand, three hundred seventy-one".