1501666506 has 32 divisors (see below), whose sum is σ = 3371450880. Its totient is φ = 495393408.

The previous prime is 1501666499. The next prime is 1501666541. The reversal of 1501666506 is 6056661051.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138106 + ... + 148581.

It is an arithmetic number, because the mean of its divisors is an integer number (105357840).

Almost surely, 2^1501666506 is an apocalyptic number.

1501666506 is an abundant number, since it is smaller than the sum of its proper divisors (1869784374).

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

1501666506 is a wasteful number, since it uses less digits than its factorization.

1501666506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286795 (or 286789 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1501666506 is about 38751.3419896653. The cubic root of 1501666506 is about 1145.1380130226.

The spelling of 1501666506 in words is "one billion, five hundred one million, six hundred sixty-six thousand, five hundred six".