64858966690 has 32 divisors (see below), whose sum is σ = 133470791424. Its totient is φ = 22229588160.

The previous prime is 64858966649. The next prime is 64858966691. The reversal of 64858966690 is 9666985846.

64858966690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64858966690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64858966691) 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, 41620 + ... + 362560.

It is an arithmetic number, because the mean of its divisors is an integer number (4170962232).

Almost surely, 2^64858966690 is an apocalyptic number.

64858966690 is an abundant number, since it is smaller than the sum of its proper divisors (68611824734).

64858966690 is a wasteful number, since it uses less digits than its factorization.

64858966690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323842.

The product of its (nonzero) digits is 134369280, while the sum is 67.

The spelling of 64858966690 in words is "sixty-four billion, eight hundred fifty-eight million, nine hundred sixty-six thousand, six hundred ninety".