63667740 has 24 divisors (see below), whose sum is σ = 178269840. Its totient is φ = 16978048.

The previous prime is 63667717. The next prime is 63667741. The reversal of 63667740 is 4776636.

It is a super-2 number, since 2×63667740² = 8107162233415200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63667741) 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, 530505 + ... + 530624.

It is an arithmetic number, because the mean of its divisors is an integer number (7427910).

Almost surely, 2^63667740 is an apocalyptic number.

63667740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63667740 is an abundant number, since it is smaller than the sum of its proper divisors (114602100).

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

63667740 is a wasteful number, since it uses less digits than its factorization.

63667740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061141 (or 1061139 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 39.

The square root of 63667740 is about 7979.2067274886. The cubic root of 63667740 is about 399.3065903188.

The spelling of 63667740 in words is "sixty-three million, six hundred sixty-seven thousand, seven hundred forty".