66793545 has 64 divisors (see below), whose sum is σ = 146173440. Its totient is φ = 28180224.

The previous prime is 66793537. The next prime is 66793553. The reversal of 66793545 is 54539766.

It is an interprime number because it is at equal distance from previous prime (66793537) and next prime (66793553).

It is not a de Polignac number, because 66793545 - 2³ = 66793537 is a prime.

It is a super-2 number, since 2×66793545² = 8922755307334050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66793545.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9567 + ... + 15003.

It is an arithmetic number, because the mean of its divisors is an integer number (2283960).

Almost surely, 2^66793545 is an apocalyptic number.

66793545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66793545 is an abundant number, since it is smaller than the sum of its proper divisors (79379895).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66793545 is a wasteful number, since it uses less digits than its factorization.

66793545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5471 (or 5465 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 66793545 is about 8172.7317954280. The cubic root of 66793545 is about 405.7372032413.

The spelling of 66793545 in words is "sixty-six million, seven hundred ninety-three thousand, five hundred forty-five".