1257366066 has 32 divisors (see below), whose sum is σ = 2744670528. Its totient is φ = 380835840.

The previous prime is 1257366049. The next prime is 1257366067. The reversal of 1257366066 is 6606637521.

It is not an unprimeable number, because it can be changed into a prime (1257366067) 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, 204006 + ... + 210078.

It is an arithmetic number, because the mean of its divisors is an integer number (85770954).

Almost surely, 2^1257366066 is an apocalyptic number.

1257366066 is an abundant number, since it is smaller than the sum of its proper divisors (1487304462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257366066 is a wasteful number, since it uses less digits than its factorization.

1257366066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9226.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 1257366066 is about 35459.3579468100. The cubic root of 1257366066 is about 1079.3291633033.

The spelling of 1257366066 in words is "one billion, two hundred fifty-seven million, three hundred sixty-six thousand, sixty-six".