1055157666 has 64 divisors (see below), whose sum is σ = 2358460800. Its totient is φ = 312754176.

The previous prime is 1055157619. The next prime is 1055157667. The reversal of 1055157666 is 6667515501.

It is a super-2 number, since 2×1055157666² = 2226715400237135112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055157667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1303870 + ... + 1304678.

It is an arithmetic number, because the mean of its divisors is an integer number (36850950).

Almost surely, 2^1055157666 is an apocalyptic number.

1055157666 is an abundant number, since it is smaller than the sum of its proper divisors (1303303134).

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

1055157666 is a wasteful number, since it uses less digits than its factorization.

1055157666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523.

The product of its (nonzero) digits is 189000, while the sum is 42.

The square root of 1055157666 is about 32483.1905144799. The cubic root of 1055157666 is about 1018.0578402709.

The spelling of 1055157666 in words is "one billion, fifty-five million, one hundred fifty-seven thousand, six hundred sixty-six".