1507878666 has 144 divisors (see below), whose sum is σ = 4114079424. Its totient is φ = 411941376.

The previous prime is 1507878661. The next prime is 1507878707. The reversal of 1507878666 is 6668787051.

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

It is not an unprimeable number, because it can be changed into a prime (1507878661) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 546346 + ... + 549098.

It is an arithmetic number, because the mean of its divisors is an integer number (28569996).

Almost surely, 2^1507878666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1507878666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2057039712).

1507878666 is an abundant number, since it is smaller than the sum of its proper divisors (2606200758).

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

1507878666 is a wasteful number, since it uses less digits than its factorization.

1507878666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807 (or 2788 counting only the distinct ones).

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

The square root of 1507878666 is about 38831.4133917374. The cubic root of 1507878666 is about 1146.7149262897.

The spelling of 1507878666 in words is "one billion, five hundred seven million, eight hundred seventy-eight thousand, six hundred sixty-six".