66252745 has 8 divisors (see below), whose sum is σ = 85619016. Its totient is φ = 48925056.

The previous prime is 66252731. The next prime is 66252773. The reversal of 66252745 is 54725266.

It can be written as a sum of positive squares in 4 ways, for example, as 2715904 + 63536841 = 1648^2 + 7971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66252745 - 2⁵ = 66252713 is a prime.

It is a Duffinian number.

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, 509572 + ... + 509701.

It is an arithmetic number, because the mean of its divisors is an integer number (10702377).

Almost surely, 2^66252745 is an apocalyptic number.

66252745 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66252745 is a deficient number, since it is larger than the sum of its proper divisors (19366271).

66252745 is a wasteful number, since it uses less digits than its factorization.

66252745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019291.

The product of its digits is 100800, while the sum is 37.

The square root of 66252745 is about 8139.5789203128. The cubic root of 66252745 is about 404.6392051758.

The spelling of 66252745 in words is "sixty-six million, two hundred fifty-two thousand, seven hundred forty-five".