66376451 has 2 divisors, whose sum is σ = 66376452. Its totient is φ = 66376450.

The previous prime is 66376441. The next prime is 66376463. The reversal of 66376451 is 15467366.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66376451 - 2¹⁰ = 66375427 is a prime.

It is not a weakly prime, because it can be changed into another prime (66376411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33188225 + 33188226.

It is an arithmetic number, because the mean of its divisors is an integer number (33188226).

Almost surely, 2^66376451 is an apocalyptic number.

66376451 is a deficient number, since it is larger than the sum of its proper divisors (1).

66376451 is an equidigital number, since it uses as much as digits as its factorization.

66376451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 66376451 is about 8147.1744181649. The cubic root of 66376451 is about 404.8908937412.

The spelling of 66376451 in words is "sixty-six million, three hundred seventy-six thousand, four hundred fifty-one".