664145496667 has 8 divisors (see below), whose sum is σ = 667110597120. Its totient is φ = 661186808640.

The previous prime is 664145496643. The next prime is 664145496697. The reversal of 664145496667 is 766694541466.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664145496667 is a prime.

It is a super-2 number, since 2×664145496667² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664145496599 and 664145496608.

It is not an unprimeable number, because it can be changed into a prime (664145496617) 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, 1395442 + ... + 1809847.

It is an arithmetic number, because the mean of its divisors is an integer number (83388824640).

Almost surely, 2^664145496667 is an apocalyptic number.

664145496667 is a deficient number, since it is larger than the sum of its proper divisors (2965100453).

664145496667 is a wasteful number, since it uses less digits than its factorization.

664145496667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206213.

The product of its digits is 156764160, while the sum is 64.

The spelling of 664145496667 in words is "six hundred sixty-four billion, one hundred forty-five million, four hundred ninety-six thousand, six hundred sixty-seven".