306660649 has 16 divisors (see below), whose sum is σ = 325304320. Its totient is φ = 288625680.

The previous prime is 306660611. The next prime is 306660659. The reversal of 306660649 is 946066603.

It is a cyclic number.

It is not a de Polignac number, because 306660649 - 2⁷ = 306660521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (306660659) 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, 504904 + ... + 505510.

It is an arithmetic number, because the mean of its divisors is an integer number (20331520).

Almost surely, 2^306660649 is an apocalyptic number.

It is an amenable number.

306660649 is a deficient number, since it is larger than the sum of its proper divisors (18643671).

306660649 is a wasteful number, since it uses less digits than its factorization.

306660649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 306660649 is about 17511.7288980843. The cubic root of 306660649 is about 674.3510170177.

The spelling of 306660649 in words is "three hundred six million, six hundred sixty thousand, six hundred forty-nine".