66351457 has 4 divisors (see below), whose sum is σ = 66536640. Its totient is φ = 66166276.

The previous prime is 66351437. The next prime is 66351463. The reversal of 66351457 is 75415366.

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 a de Polignac number, because none of the positive numbers 2^k-66351457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66351437) 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, 92053 + ... + 92770.

It is an arithmetic number, because the mean of its divisors is an integer number (16634160).

Almost surely, 2^66351457 is an apocalyptic number.

It is an amenable number.

66351457 is a deficient number, since it is larger than the sum of its proper divisors (185183).

66351457 is a wasteful number, since it uses less digits than its factorization.

66351457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185182.

The product of its digits is 75600, while the sum is 37.

The square root of 66351457 is about 8145.6403677059. The cubic root of 66351457 is about 404.8400669128.

The spelling of 66351457 in words is "sixty-six million, three hundred fifty-one thousand, four hundred fifty-seven".