666448701 has 16 divisors (see below), whose sum is σ = 910508544. Its totient is φ = 433372464.

The previous prime is 666448687. The next prime is 666448709. The reversal of 666448701 is 107844666.

It is not a de Polignac number, because 666448701 - 2⁵ = 666448669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666448709) 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, 103560 + ... + 109806.

It is an arithmetic number, because the mean of its divisors is an integer number (56906784).

Almost surely, 2^666448701 is an apocalyptic number.

It is an amenable number.

666448701 is a deficient number, since it is larger than the sum of its proper divisors (244059843).

666448701 is a wasteful number, since it uses less digits than its factorization.

666448701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7120.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 666448701 is about 25815.6677426713. The cubic root of 666448701 is about 873.4852490845.

The spelling of 666448701 in words is "six hundred sixty-six million, four hundred forty-eight thousand, seven hundred one".