66002057 has 16 divisors (see below), whose sum is σ = 75185280. Its totient is φ = 57388800.

The previous prime is 66002017. The next prime is 66002063. The reversal of 66002057 is 75020066.

It is a cyclic number.

It is not a de Polignac number, because 66002057 - 2¹⁸ = 65739913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66002017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35132 + ... + 36962.

It is an arithmetic number, because the mean of its divisors is an integer number (4699080).

Almost surely, 2^66002057 is an apocalyptic number.

It is an amenable number.

66002057 is a deficient number, since it is larger than the sum of its proper divisors (9183223).

66002057 is a wasteful number, since it uses less digits than its factorization.

66002057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 66002057 is about 8124.1650032480. The cubic root of 66002057 is about 404.1282004180.

Subtracting 66002057 from its reverse (75020066), we obtain a square (9018009 = 3003²).

The spelling of 66002057 in words is "sixty-six million, two thousand, fifty-seven".