66754057 has 2 divisors, whose sum is σ = 66754058. Its totient is φ = 66754056.

The previous prime is 66754033. The next prime is 66754081. The reversal of 66754057 is 75045766.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (66754033) and next prime (66754081).

It can be written as a sum of positive squares in only one way, i.e., 53056656 + 13697401 = 7284^2 + 3701^2 .

It is a cyclic number.

It is not a de Polignac number, because 66754057 - 2¹¹ = 66752009 is a prime.

It is a super-2 number, since 2×66754057² = 8912208251918498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66754007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33377028 + 33377029.

It is an arithmetic number, because the mean of its divisors is an integer number (33377029).

Almost surely, 2^66754057 is an apocalyptic number.

It is an amenable number.

66754057 is a deficient number, since it is larger than the sum of its proper divisors (1).

66754057 is an equidigital number, since it uses as much as digits as its factorization.

66754057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 66754057 is about 8170.3155997795. The cubic root of 66754057 is about 405.6572308975.

The spelling of 66754057 in words is "sixty-six million, seven hundred fifty-four thousand, fifty-seven".