6615945973 has 8 divisors (see below), whose sum is σ = 8142702848. Its totient is φ = 5234594544.

The previous prime is 6615945967. The next prime is 6615945979. The reversal of 6615945973 is 3795495166.

It is an interprime number because it is at equal distance from previous prime (6615945967) and next prime (6615945979).

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 6615945973 - 2⁹ = 6615945461 is a prime.

It is a super-2 number, since 2×6615945973² = 87541482235309833458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6615945979) 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, 36351261 + ... + 36351442.

It is an arithmetic number, because the mean of its divisors is an integer number (1017837856).

Almost surely, 2^6615945973 is an apocalyptic number.

It is an amenable number.

6615945973 is a deficient number, since it is larger than the sum of its proper divisors (1526756875).

6615945973 is a wasteful number, since it uses less digits than its factorization.

6615945973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72702723.

The product of its digits is 6123600, while the sum is 55.

The square root of 6615945973 is about 81338.4655190888. The cubic root of 6615945973 is about 1877.2869018301.

The spelling of 6615945973 in words is "six billion, six hundred fifteen million, nine hundred forty-five thousand, nine hundred seventy-three".