1501665166 has 4 divisors (see below), whose sum is σ = 2252497752. Its totient is φ = 750832582.

The previous prime is 1501665149. The next prime is 1501665173. The reversal of 1501665166 is 6615661051.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 375416290 + ... + 375416293.

It is an arithmetic number, because the mean of its divisors is an integer number (563124438).

Almost surely, 2^1501665166 is an apocalyptic number.

1501665166 is a deficient number, since it is larger than the sum of its proper divisors (750832586).

1501665166 is an equidigital number, since it uses as much as digits as its factorization.

1501665166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750832585.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1501665166 is about 38751.3246999377. The cubic root of 1501665166 is about 1145.1376724043.

The spelling of 1501665166 in words is "one billion, five hundred one million, six hundred sixty-five thousand, one hundred sixty-six".