611664723 has 64 divisors (see below), whose sum is σ = 987148800. Its totient is φ = 373403520.

The previous prime is 611664707. The next prime is 611664733. The reversal of 611664723 is 327466116.

It is a happy number.

611664723 is a `hidden beast` number, since 6 + 1 + 1 + 6 + 647 + 2 + 3 = 666.

It is not a de Polignac number, because 611664723 - 2⁴ = 611664707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (611664733) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1245508 + ... + 1245998.

It is an arithmetic number, because the mean of its divisors is an integer number (15424200).

Almost surely, 2^611664723 is an apocalyptic number.

611664723 is a deficient number, since it is larger than the sum of its proper divisors (375484077).

611664723 is a wasteful number, since it uses less digits than its factorization.

611664723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 603 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 611664723 is about 24731.8564406314. The cubic root of 611664723 is about 848.8634049620.

The spelling of 611664723 in words is "six hundred eleven million, six hundred sixty-four thousand, seven hundred twenty-three".