66700454 has 4 divisors (see below), whose sum is σ = 100050684. Its totient is φ = 33350226.

The previous prime is 66700451. The next prime is 66700463. The reversal of 66700454 is 45400766.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×66700454² = 8897901127612232, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66700454.

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 as a sum of consecutive naturals, namely, 16675112 + ... + 16675115.

It is an arithmetic number, because the mean of its divisors is an integer number (25012671).

Almost surely, 2^66700454 is an apocalyptic number.

66700454 is a deficient number, since it is larger than the sum of its proper divisors (33350230).

66700454 is a wasteful number, since it uses less digits than its factorization.

66700454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33350229.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 66700454 is about 8167.0345903516. The cubic root of 66700454 is about 405.5486219313.

The spelling of 66700454 in words is "sixty-six million, seven hundred thousand, four hundred fifty-four".