645066579 has 8 divisors (see below), whose sum is σ = 897484032. Its totient is φ = 411346760.

The previous prime is 645066557. The next prime is 645066599. The reversal of 645066579 is 975660546.

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

It is a cyclic number.

It is not a de Polignac number, because 645066579 - 2⁷ = 645066451 is a prime.

It is a super-2 number, since 2×645066579² = 832221782685526482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645066599) 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, 4674327 + ... + 4674464.

It is an arithmetic number, because the mean of its divisors is an integer number (112185504).

Almost surely, 2^645066579 is an apocalyptic number.

645066579 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

645066579 is a deficient number, since it is larger than the sum of its proper divisors (252417453).

645066579 is a wasteful number, since it uses less digits than its factorization.

645066579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9348817.

The product of its (nonzero) digits is 1360800, while the sum is 48.

The square root of 645066579 is about 25398.1609373592. The cubic root of 645066579 is about 864.0419874678.

The spelling of 645066579 in words is "six hundred forty-five million, sixty-six thousand, five hundred seventy-nine".