649666970 has 32 divisors (see below), whose sum is σ = 1221920640. Its totient is φ = 248226880.

The previous prime is 649666967. The next prime is 649666973. The reversal of 649666970 is 79666946.

It is an interprime number because it is at equal distance from previous prime (649666967) and next prime (649666973).

It is not an unprimeable number, because it can be changed into a prime (649666973) 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, 221876 + ... + 224784.

It is an arithmetic number, because the mean of its divisors is an integer number (38185020).

Almost surely, 2^649666970 is an apocalyptic number.

649666970 is a deficient number, since it is larger than the sum of its proper divisors (572253670).

649666970 is a wasteful number, since it uses less digits than its factorization.

649666970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The square root of 649666970 is about 25488.5654755225. The cubic root of 649666970 is about 866.0911397553.

The spelling of 649666970 in words is "six hundred forty-nine million, six hundred sixty-six thousand, nine hundred seventy".