66992377 has 2 divisors, whose sum is σ = 66992378. Its totient is φ = 66992376.

The previous prime is 66992369. The next prime is 66992383. The reversal of 66992377 is 77329966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39576681 + 27415696 = 6291^2 + 5236^2 .

It is a cyclic number.

It is not a de Polignac number, because 66992377 - 2³ = 66992369 is a prime.

It is a super-2 number, since 2×66992377² = 8975957152220258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66992377.

It is not a weakly prime, because it can be changed into another prime (66992357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33496188 + 33496189.

It is an arithmetic number, because the mean of its divisors is an integer number (33496189).

Almost surely, 2^66992377 is an apocalyptic number.

It is an amenable number.

66992377 is a deficient number, since it is larger than the sum of its proper divisors (1).

66992377 is an equidigital number, since it uses as much as digits as its factorization.

66992377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 49.

The square root of 66992377 is about 8184.8871097896. The cubic root of 66992377 is about 406.1394058876.

The spelling of 66992377 in words is "sixty-six million, nine hundred ninety-two thousand, three hundred seventy-seven".