1376661000 has 256 divisors, whose sum is σ = 5047660800. Its totient is φ = 307968000.

The previous prime is 1376660963. The next prime is 1376661047. The reversal of 1376661000 is 1666731.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 427396 + ... + 430604.

It is an arithmetic number, because the mean of its divisors is an integer number (19717425).

Almost surely, 2^1376661000 is an apocalyptic number.

1376661000 is a gapful number since it is divisible by the number (10) 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 1376661000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2523830400).

1376661000 is an abundant number, since it is smaller than the sum of its proper divisors (3670999800).

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

1376661000 is a wasteful number, since it uses less digits than its factorization.

1376661000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257 (or 3243 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1376661000 is about 37103.3825951220. The cubic root of 1376661000 is about 1112.4376264319.

The spelling of 1376661000 in words is "one billion, three hundred seventy-six million, six hundred sixty-one thousand".