66714765 has 32 divisors (see below), whose sum is σ = 115395840. Its totient is φ = 32718336.

The previous prime is 66714733. The next prime is 66714793. The reversal of 66714765 is 56741766.

It is not a de Polignac number, because 66714765 - 2⁵ = 66714733 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69529 + ... + 70481.

It is an arithmetic number, because the mean of its divisors is an integer number (3606120).

Almost surely, 2^66714765 is an apocalyptic number.

66714765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66714765 is a deficient number, since it is larger than the sum of its proper divisors (48681075).

66714765 is a wasteful number, since it uses less digits than its factorization.

66714765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333.

The product of its digits is 211680, while the sum is 42.

The square root of 66714765 is about 8167.9106875626. The cubic root of 66714765 is about 405.5776241892.

The spelling of 66714765 in words is "sixty-six million, seven hundred fourteen thousand, seven hundred sixty-five".