1166778534 has 16 divisors (see below), whose sum is σ = 2335339440. Its totient is φ = 388629120.

The previous prime is 1166778499. The next prime is 1166778583. The reversal of 1166778534 is 4358776611.

It is a super-2 number, since 2×1166778534² = 2722744294806378312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65679 + ... + 81530.

It is an arithmetic number, because the mean of its divisors is an integer number (145958715).

Almost surely, 2^1166778534 is an apocalyptic number.

1166778534 is an abundant number, since it is smaller than the sum of its proper divisors (1168560906).

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

1166778534 is a wasteful number, since it uses less digits than its factorization.

1166778534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148535.

The product of its digits is 846720, while the sum is 48.

The square root of 1166778534 is about 34158.1400840268. The cubic root of 1166778534 is about 1052.7602458819.

The spelling of 1166778534 in words is "one billion, one hundred sixty-six million, seven hundred seventy-eight thousand, five hundred thirty-four".