66700455 has 16 divisors (see below), whose sum is σ = 109605984. Its totient is φ = 34611840.

The previous prime is 66700451. The next prime is 66700463. The reversal of 66700455 is 55400766.

It is not a de Polignac number, because 66700455 - 2² = 66700451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59536 + ... + 60645.

It is an arithmetic number, because the mean of its divisors is an integer number (6850374).

Almost surely, 2^66700455 is an apocalyptic number.

66700455 is a deficient number, since it is larger than the sum of its proper divisors (42905529).

66700455 is a wasteful number, since it uses less digits than its factorization.

66700455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120226.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 66700455 is about 8167.0346515734. The cubic root of 66700455 is about 405.5486239580.

Adding to 66700455 its reverse (55400766), we get a palindrome (122101221).

The spelling of 66700455 in words is "sixty-six million, seven hundred thousand, four hundred fifty-five".