1866371045 has 128 divisors (see below), whose sum is σ = 3096576000. Its totient is φ = 1066867200.

The previous prime is 1866370999. The next prime is 1866371047. The reversal of 1866371045 is 5401736681.

It is not a de Polignac number, because 1866371045 - 2⁶ = 1866370981 is a prime.

It is a super-2 number, since 2×1866371045² = 6966681755228784050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 1866370993 and 1866371011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866371047) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14695772 + ... + 14695898.

It is an arithmetic number, because the mean of its divisors is an integer number (24192000).

Almost surely, 2^1866371045 is an apocalyptic number.

It is an amenable number.

1866371045 is a deficient number, since it is larger than the sum of its proper divisors (1230204955).

1866371045 is a wasteful number, since it uses less digits than its factorization.

1866371045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 1866371045 is about 43201.5166979124. The cubic root of 1866371045 is about 1231.2114982936.

The spelling of 1866371045 in words is "one billion, eight hundred sixty-six million, three hundred seventy-one thousand, forty-five".