1666965150 has 48 divisors (see below), whose sum is σ = 4593418800. Its totient is φ = 444523680.

The previous prime is 1666965137. The next prime is 1666965151. The reversal of 1666965150 is 515696661.

It is a super-2 number, since 2×1666965150² = 5557545622629045000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1666965096 and 1666965105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666965151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 616045 + ... + 618744.

It is an arithmetic number, because the mean of its divisors is an integer number (95696225).

Almost surely, 2^1666965150 is an apocalyptic number.

1666965150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666965150 is an abundant number, since it is smaller than the sum of its proper divisors (2926453650).

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

1666965150 is a wasteful number, since it uses less digits than its factorization.

1666965150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234810 (or 1234799 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 1666965150 is about 40828.4845420449. The cubic root of 1666965150 is about 1185.7018754965.

The spelling of 1666965150 in words is "one billion, six hundred sixty-six million, nine hundred sixty-five thousand, one hundred fifty".