64979700 has 72 divisors (see below), whose sum is σ = 189279552. Its totient is φ = 17210880.

The previous prime is 64979671. The next prime is 64979723. The reversal of 64979700 is 797946.

It is a super-3 number, since 3×64979700³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49452 + ... + 50748.

Almost surely, 2^64979700 is an apocalyptic number.

64979700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64979700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94639776).

64979700 is an abundant number, since it is smaller than the sum of its proper divisors (124299852).

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

64979700 is a wasteful number, since it uses less digits than its factorization.

64979700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481 (or 1474 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 64979700 is about 8060.9986974320. The cubic root of 64979700 is about 402.0307147146.

The spelling of 64979700 in words is "sixty-four million, nine hundred seventy-nine thousand, seven hundred".