15000066660 has 24 divisors (see below), whose sum is σ = 42000186816. Its totient is φ = 4000017760.

The previous prime is 15000066643. The next prime is 15000066661. The reversal of 15000066660 is 6666000051.

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

It is not an unprimeable number, because it can be changed into a prime (15000066661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125000496 + ... + 125000615.

It is an arithmetic number, because the mean of its divisors is an integer number (1750007784).

Almost surely, 2^15000066660 is an apocalyptic number.

15000066660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15000066660 is an abundant number, since it is smaller than the sum of its proper divisors (27000120156).

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

15000066660 is a wasteful number, since it uses less digits than its factorization.

15000066660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250001123 (or 250001121 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 15000066660 in words is "fifteen billion, sixty-six thousand, six hundred sixty".