420066661 has 24 divisors (see below), whose sum is σ = 504591360. Its totient is φ = 348419232.

The previous prime is 420066637. The next prime is 420066671. The reversal of 420066661 is 166660024.

It is not a de Polignac number, because 420066661 - 2⁷ = 420066533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420066671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 403780 + ... + 404818.

It is an arithmetic number, because the mean of its divisors is an integer number (21024640).

Almost surely, 2^420066661 is an apocalyptic number.

It is an amenable number.

420066661 is a deficient number, since it is larger than the sum of its proper divisors (84524699).

420066661 is a wasteful number, since it uses less digits than its factorization.

420066661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 420066661 is about 20495.5278292607. The cubic root of 420066661 is about 748.9268569213.

The spelling of 420066661 in words is "four hundred twenty million, sixty-six thousand, six hundred sixty-one".