66251050 has 12 divisors (see below), whose sum is σ = 123227046. Its totient is φ = 26500400.

The previous prime is 66251021. The next prime is 66251069. The reversal of 66251050 is 5015266.

It can be written as a sum of positive squares in 3 ways, for example, as 56535361 + 9715689 = 7519^2 + 3117^2 .

It is a super-2 number, since 2×66251050² = 8778403252205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 662461 + ... + 662560.

Almost surely, 2^66251050 is an apocalyptic number.

66251050 is a deficient number, since it is larger than the sum of its proper divisors (56975996).

66251050 is a wasteful number, since it uses less digits than its factorization.

66251050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325033 (or 1325028 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 66251050 is about 8139.4747987816. The cubic root of 66251050 is about 404.6357544041.

The spelling of 66251050 in words is "sixty-six million, two hundred fifty-one thousand, fifty".