66750377 has 4 divisors (see below), whose sum is σ = 66840960. Its totient is φ = 66659796.

The previous prime is 66750349. The next prime is 66750391. The reversal of 66750377 is 77305766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66750377 - 2⁸ = 66750121 is a prime.

It is a super-2 number, since 2×66750377² = 8911225659284258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66753377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44177 + ... + 45662.

It is an arithmetic number, because the mean of its divisors is an integer number (16710240).

Almost surely, 2^66750377 is an apocalyptic number.

It is an amenable number.

66750377 is a deficient number, since it is larger than the sum of its proper divisors (90583).

66750377 is an equidigital number, since it uses as much as digits as its factorization.

66750377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90582.

The product of its (nonzero) digits is 185220, while the sum is 41.

The square root of 66750377 is about 8170.0903911768. The cubic root of 66750377 is about 405.6497764390.

The spelling of 66750377 in words is "sixty-six million, seven hundred fifty thousand, three hundred seventy-seven".