66767629 has 2 divisors, whose sum is σ = 66767630. Its totient is φ = 66767628.

The previous prime is 66767621. The next prime is 66767633. The reversal of 66767629 is 92676766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49378729 + 17388900 = 7027^2 + 4170^2 .

It is a cyclic number.

It is not a de Polignac number, because 66767629 - 2³ = 66767621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66767621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33383814 + 33383815.

It is an arithmetic number, because the mean of its divisors is an integer number (33383815).

Almost surely, 2^66767629 is an apocalyptic number.

It is an amenable number.

66767629 is a deficient number, since it is larger than the sum of its proper divisors (1).

66767629 is an equidigital number, since it uses as much as digits as its factorization.

66767629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 49.

The square root of 66767629 is about 8171.1461252385. The cubic root of 66767629 is about 405.6847208964.

The spelling of 66767629 in words is "sixty-six million, seven hundred sixty-seven thousand, six hundred twenty-nine".