66750370 has 16 divisors (see below), whose sum is σ = 125375040. Its totient is φ = 25539184.

The previous prime is 66750349. The next prime is 66750391. The reversal of 66750370 is 7305766.

It is an interprime number because it is at equal distance from previous prime (66750349) and next prime (66750391).

It is a super-2 number, since 2×66750370² = 8911223790273800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144880 + ... + 145339.

It is an arithmetic number, because the mean of its divisors is an integer number (7835940).

Almost surely, 2^66750370 is an apocalyptic number.

66750370 is a deficient number, since it is larger than the sum of its proper divisors (58624670).

66750370 is a wasteful number, since it uses less digits than its factorization.

66750370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290249.

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 66750370 is about 8170.0899627850. The cubic root of 66750370 is about 405.6497622590.

The spelling of 66750370 in words is "sixty-six million, seven hundred fifty thousand, three hundred seventy".