666424767 has 8 divisors (see below), whose sum is σ = 888698800. Its totient is φ = 444216960.

The previous prime is 666424757. The next prime is 666424771. The reversal of 666424767 is 767424666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666424767 - 2⁴ = 666424751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666424757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16167 + ... + 39927.

It is an arithmetic number, because the mean of its divisors is an integer number (111087350).

Almost surely, 2^666424767 is an apocalyptic number.

666424767 is a deficient number, since it is larger than the sum of its proper divisors (222274033).

666424767 is a wasteful number, since it uses less digits than its factorization.

666424767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33113.

The product of its digits is 2032128, while the sum is 48.

The square root of 666424767 is about 25815.2041828067. The cubic root of 666424767 is about 873.4747925426.

The spelling of 666424767 in words is "six hundred sixty-six million, four hundred twenty-four thousand, seven hundred sixty-seven".