1077665688 has 96 divisors (see below), whose sum is σ = 3290473200. Its totient is φ = 326557440.

The previous prime is 1077665681. The next prime is 1077665753. The reversal of 1077665688 is 8865667701.

1077665688 is a `hidden beast` number, since 1 + 0 + 7 + 76 + 6 + 568 + 8 = 666.

It is a super-2 number, since 2×1077665688² = 2322726670185026688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1077665681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5520 + ... + 46752.

Almost surely, 2^1077665688 is an apocalyptic number.

1077665688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1077665688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645236600).

1077665688 is an abundant number, since it is smaller than the sum of its proper divisors (2212807512).

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

1077665688 is a wasteful number, since it uses less digits than its factorization.

1077665688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41270 (or 41249 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The square root of 1077665688 is about 32827.8188127082. The cubic root of 1077665688 is about 1025.2458464028.

The spelling of 1077665688 in words is "one billion, seventy-seven million, six hundred sixty-five thousand, six hundred eighty-eight".