1057245666 has 16 divisors (see below), whose sum is σ = 2120385600. Its totient is φ = 351432848.

The previous prime is 1057245661. The next prime is 1057245667. The reversal of 1057245666 is 6665427501.

It is a super-2 number, since 2×1057245666² = 2235536796551567112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1057245661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243261 + ... + 247568.

It is an arithmetic number, because the mean of its divisors is an integer number (132524100).

Almost surely, 2^1057245666 is an apocalyptic number.

1057245666 is an abundant number, since it is smaller than the sum of its proper divisors (1063139934).

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

1057245666 is a wasteful number, since it uses less digits than its factorization.

1057245666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491193.

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 1057245666 is about 32515.3143303275. The cubic root of 1057245666 is about 1018.7289261276.

The spelling of 1057245666 in words is "one billion, fifty-seven million, two hundred forty-five thousand, six hundred sixty-six".