461640667 has 4 divisors (see below), whose sum is σ = 462017520. Its totient is φ = 461263816.

The previous prime is 461640649. The next prime is 461640671. The reversal of 461640667 is 766046164.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-461640667 is a prime.

It is a super-2 number, since 2×461640667² = 426224210856409778, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (461640617) 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, 186583 + ... + 189040.

It is an arithmetic number, because the mean of its divisors is an integer number (115504380).

Almost surely, 2^461640667 is an apocalyptic number.

461640667 is a deficient number, since it is larger than the sum of its proper divisors (376853).

461640667 is a wasteful number, since it uses less digits than its factorization.

461640667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376852.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 461640667 is about 21485.8247921740. The cubic root of 461640667 is about 772.8609301263.

The spelling of 461640667 in words is "four hundred sixty-one million, six hundred forty thousand, six hundred sixty-seven".