667614545 has 16 divisors (see below), whose sum is σ = 871314192. Its totient is φ = 488121600.

The previous prime is 667614527. The next prime is 667614551. The reversal of 667614545 is 545416766.

It can be written as a sum of positive squares in 8 ways, for example, as 6507601 + 661106944 = 2551^2 + 25712^2 .

It is not a de Polignac number, because 667614545 - 2¹⁸ = 667352401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667614496 and 667614505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44282 + ... + 57411.

It is an arithmetic number, because the mean of its divisors is an integer number (54457137).

Almost surely, 2^667614545 is an apocalyptic number.

667614545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

667614545 is a deficient number, since it is larger than the sum of its proper divisors (203699647).

667614545 is a wasteful number, since it uses less digits than its factorization.

667614545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101812.

The product of its digits is 604800, while the sum is 44.

The square root of 667614545 is about 25838.2380397735. The cubic root of 667614545 is about 873.9942926664.

The spelling of 667614545 in words is "six hundred sixty-seven million, six hundred fourteen thousand, five hundred forty-five".