1866152925 has 360 divisors, whose sum is σ = 4612829760. Its totient is φ = 727833600.

The previous prime is 1866152891. The next prime is 1866152941. The reversal of 1866152925 is 5292516681.

1866152925 is a `hidden beast` number, since 1 + 8 + 6 + 615 + 2 + 9 + 25 = 666.

It is not a de Polignac number, because 1866152925 - 2⁷ = 1866152797 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 45515905 + ... + 45515945.

It is an arithmetic number, because the mean of its divisors is an integer number (12813416).

Almost surely, 2^1866152925 is an apocalyptic number.

1866152925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1866152925 is an abundant number, since it is smaller than the sum of its proper divisors (2746676835).

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

1866152925 is a wasteful number, since it uses less digits than its factorization.

1866152925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 88 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 1866152925 is about 43198.9921757441. The cubic root of 1866152925 is about 1231.1635331413.

The spelling of 1866152925 in words is "one billion, eight hundred sixty-six million, one hundred fifty-two thousand, nine hundred twenty-five".